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351 results on '"GRAWE, H."'

1. Analysis and results of the ¹⁰⁴Sn Coulomb excitation experiment

Author: Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., Wollersheim, H. J., Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., and Wollersheim, H. J.
Published: 2024

2. Analysis and results of the ¹⁰⁴Sn Coulomb excitation experiment

Author: Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., Wollersheim, H. J., Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., and Wollersheim, H. J.
Published: 2024

3. Analysis and results of the ¹⁰⁴Sn Coulomb excitation experiment

Author: Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., Wollersheim, H. J., Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., and Wollersheim, H. J.
Published: 2024

4. Analysis and results of the ¹⁰⁴Sn Coulomb excitation experiment

Author: Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., Wollersheim, H. J., Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Pardo, C. Domingo, Estrade, A., Farinon, F., Gerl, J., Goel, N., Grȩbosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. Nara, Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Swaleh, T., Taprogge, J., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., and Wollersheim, H. J.
Published: 2024

5. Nuclear structure aspects of the heaviest N similar to Z nuclei south of Sn-100

Author: Gorska, M., Albers, H. M., Arici, T., Banerjee, A., Benzoni, G., Blazhev, A., Cederwall, Bo, Das, B., Davinson, T., Gerl, J., Grawe, H., Hall, O., Hubbard, N., Jazrawi, S., Jolie, J., Mikolajczuk, M., Mistry, A. K., Mengoni, D., Podolyak, Zs., Polettini, M., Regan, P. H., Ruedigier, M., Yaneva, A., Vesic, J., Zhang, G., Gorska, M., Albers, H. M., Arici, T., Banerjee, A., Benzoni, G., Blazhev, A., Cederwall, Bo, Das, B., Davinson, T., Gerl, J., Grawe, H., Hall, O., Hubbard, N., Jazrawi, S., Jolie, J., Mikolajczuk, M., Mistry, A. K., Mengoni, D., Podolyak, Zs., Polettini, M., Regan, P. H., Ruedigier, M., Yaneva, A., Vesic, J., and Zhang, G.
Abstract: Ever-lasting interest in the structure of Sn-100 and neighbouring nuclei is still well justified by the fact that it is the heaviest doubly-magic nucleus with N=Z. State-of-the-art experimental techniques involving stable and radioactive beam facilities have enabled access to these exotic nuclei. In particular, the analysis of experimental data obtained in two DESPEC experiments at GSI Darmstadt extends the information on the shell structure and its evolution towards N = Z = 50, and allows the study of seniority conservation and proton-neutron interaction in the g(9/2) orbit. Several theoretical approaches for shell-model investigations are discussed and their predictive power assessed. The calculated systematics of the reduced transition probabilities for high- to medium-spin states in N similar to Z isotopes with active g(9/2) orbit is presented for the first time., QC 20230731
Published: 2023
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6. The (6+) isomer in 102Sn revisited : Neutron and proton effective charges close to the double shell closure

Author: Grawe, H., Straub, K., Faestermann, T., Górska, M., Hinke, C., Krücken, R., Nowacki, F., Böhmer, M., Boutachkov, P., Geissel, H., Gernhäuser, R., Gottardo, A., Grebosz, J., Kurz, N., Liu, Z., Maier, L., Pietri, S., Podolyák, Zs, Steiger, K., Weick, H., Wollersheim, H. J., Woods, P. J., Al-Dahan, N., Alkhomashi, N., Atac, A., Blazhev, A., Braun, N., Celikovic, I., Davinson, T., Dillmann, I., Domingo-Pardo, C., Doornenbal, P., Farrelly, G., Farinon, F., de France, G., Gerl, J., Goel, N., Habermann, T., Hoischen, R., Janik, R., Karny, M., Kaskas, A., Kojouharov, I., Kröll, Th., Lewitowicz, M., Litvinov, Yu. A., Myalski, S., Nebel, F., Nishimura, S., Nociforo, C., Nyberg, Johan, Parikh, A., Procházka, A., Regan, P. H., Rigollet, C., Schaffner, H., Scheidenberger, C., Schwertel, S., Söderström, Pär-Anders, Steer, S., Stolz, A., Strmen, P., Grawe, H., Straub, K., Faestermann, T., Górska, M., Hinke, C., Krücken, R., Nowacki, F., Böhmer, M., Boutachkov, P., Geissel, H., Gernhäuser, R., Gottardo, A., Grebosz, J., Kurz, N., Liu, Z., Maier, L., Pietri, S., Podolyák, Zs, Steiger, K., Weick, H., Wollersheim, H. J., Woods, P. J., Al-Dahan, N., Alkhomashi, N., Atac, A., Blazhev, A., Braun, N., Celikovic, I., Davinson, T., Dillmann, I., Domingo-Pardo, C., Doornenbal, P., Farrelly, G., Farinon, F., de France, G., Gerl, J., Goel, N., Habermann, T., Hoischen, R., Janik, R., Karny, M., Kaskas, A., Kojouharov, I., Kröll, Th., Lewitowicz, M., Litvinov, Yu. A., Myalski, S., Nebel, F., Nishimura, S., Nociforo, C., Nyberg, Johan, Parikh, A., Procházka, A., Regan, P. H., Rigollet, C., Schaffner, H., Scheidenberger, C., Schwertel, S., Söderström, Pär-Anders, Steer, S., Stolz, A., and Strmen, P.
Abstract: Title in Web of Science: The (6(+)) isomer in Sn-102 revisited: Neutron and proton effective charges close to the double shell closure
Published: 2021
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7. New beta-decaying state in Bi-214

Author: Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Lica, R., Naidja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D., V, Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I, Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V, Rahkila, P., Rapisarda, E., Rezynkina, K., Sanchez-Tembleque, V, Schomacker, K., Seliverstov, M. D., Sotty, C., Stan, L., Surder, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., Warr, N., Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Lica, R., Naidja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D., V, Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I, Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V, Rahkila, P., Rapisarda, E., Rezynkina, K., Sanchez-Tembleque, V, Schomacker, K., Seliverstov, M. D., Sotty, C., Stan, L., Surder, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., and Warr, N.
Abstract: A new beta-decaying state in Bi-214 has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred I-pi = (8(-)) assignment was suggested for this state based on the beta-decay feeding pattern to levels in Po-214 and shell-model calculations. The half-life of the I-pi = (8) state was deduced to be T-1/2 = 9.39(10) min. The deexcitation of the levels populated in Po-214 by the beta decay of this state was investigated via gamma-gamma coincidences and a number of new levels and transitions was identified. Shell-model calculations for excited states in Bi-214 and Po-214 were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new beta-decaying state as an I-pi = 8 - isomer and allow for tentative assignment of shell-model states to several high-spin states in Po-214.
Published: 2021

8. The (6(+)) isomer in Sn-102 revisited: Neutron and proton effective charges close to the double shell closure

Author: Grawe, H., Straub, K., Faestermann, T., Gorska, M., Hinke, C., Kruecken, R., Nowacki, F., Boehmer, M., Boutachkov, P., Geissel, H., Gernhaeuser, R., Gottardo, A., Grebosz, J., Kurz, N., Liu, Z., Maier, L., Pietri, S., Podolyak, Zs, Steiger, K., Weick, H., Wollersheim, H. J., Woods, P. J., Al-Dahan, N., Alkhomashi, N., Atac, A., Blazhev, A., Braun, N., Celikovic, I, Davinson, T., Dillmann, I, Domingo-Pardo, C., Doornenbal, P., Farrelly, G., Farinon, F., de France, G., Gerl, J., Goel, N., Habermann, T., Hoischen, R., Janik, R., Karny, M., Kaskas, A., Kojouharov, I, Kroell, Th, Lewitowicz, M., Litvinov, Yu A., Myalski, S., Nebel, F., Nishimura, S., Nociforo, C., Nyberg, J., Parikh, A., Prochazka, A., Regan, P. H., Rigollet, C., Schaffner, H., Scheidenberger, C., Schwertel, S., Soderstrom, P-A, Steer, S., Stolz, A., Strmen, P., Grawe, H., Straub, K., Faestermann, T., Gorska, M., Hinke, C., Kruecken, R., Nowacki, F., Boehmer, M., Boutachkov, P., Geissel, H., Gernhaeuser, R., Gottardo, A., Grebosz, J., Kurz, N., Liu, Z., Maier, L., Pietri, S., Podolyak, Zs, Steiger, K., Weick, H., Wollersheim, H. J., Woods, P. J., Al-Dahan, N., Alkhomashi, N., Atac, A., Blazhev, A., Braun, N., Celikovic, I, Davinson, T., Dillmann, I, Domingo-Pardo, C., Doornenbal, P., Farrelly, G., Farinon, F., de France, G., Gerl, J., Goel, N., Habermann, T., Hoischen, R., Janik, R., Karny, M., Kaskas, A., Kojouharov, I, Kroell, Th, Lewitowicz, M., Litvinov, Yu A., Myalski, S., Nebel, F., Nishimura, S., Nociforo, C., Nyberg, J., Parikh, A., Prochazka, A., Regan, P. H., Rigollet, C., Schaffner, H., Scheidenberger, C., Schwertel, S., Soderstrom, P-A, Steer, S., Stolz, A., and Strmen, P.
Abstract: In a high-energy fragmentation experiment at GSI an I-pi = (6(+)) isomer and its gamma-decay are identified in Sn-102, the two-neutron neighbour of the doubly-magic Sn-100. Its half-life is measured to be T-1/2 = 367(11) ns. The possible existence of further isomers is discussed in the framework of large-scale shell model (LSSM) calculations including up to five particle-hole excitations of the Sn-100 core. From the precise B(E2; 6(+) -> 4(+)) strength and the recently remeasured value for B(E2; 8(+) -> 6(+)) in the two-proton hole neighbour Cd-98 effective E2 polarization charges for protons and neutrons were inferred including LSSM corrections within the full N=4 0h omega space. The results are discussed in comparison to predicted and empirically determined effective operators. (C) 2021 The Author(s). Published by Elsevier B.V.
Published: 2021

9. DESPEC Phase-0 campaign at GSI

Author: Polettini, M., Jazrawi, S., Chishti, M. M. R., Yaneva, A., Das, B., Banerjee, A., Hubbard, N., Mistry, A. K., Albers, H. M., Shearman, R., Gorska, M., Gerl, J., Regan, P. H., Cederwall, B., Jolie, J., Alhomaidhi, S., Arici, T., Benzoni, G., Boutachkov, P., Davinson, T., Dickel, T., Haettner, E., Hall, O., Heggen, H., John, P. R., Kojouharov, I, Kurz, N., Singh, B. S. Nara, Pietri, S., Podolyak, Zs, Rudigier, M., Sahin, E., Schaffner, H., Scheidenberger, C., Sharma, A., Vesic, J., Weick, H., Wollersheim, H. J., Ahmed, U., Aktas, O., Algora, A., Appleton, C., Benito, J., Blazhev, A., Bracco, A., Bruce, A., Brunet, M., Canavan, R., Esmaylzadeh, A., Fraile, L. M., Grawe, H., Haefner, G., Kahl, D., Karayonchev, V, Kern, R., Kosir, G., Lozeva, R., Napiralla, P., Page, R., Petrache, C. M., Petrovic, J., Pietralla, N., Regis, J-M, Ruotsalainen, P., Sexton, L., Sanchez-Temble, V, Si, M., Vilhena, J., Werner, V, Wiederhold, J., Witt, W., Woods, P., Zimba, G., Polettini, M., Jazrawi, S., Chishti, M. M. R., Yaneva, A., Das, B., Banerjee, A., Hubbard, N., Mistry, A. K., Albers, H. M., Shearman, R., Gorska, M., Gerl, J., Regan, P. H., Cederwall, B., Jolie, J., Alhomaidhi, S., Arici, T., Benzoni, G., Boutachkov, P., Davinson, T., Dickel, T., Haettner, E., Hall, O., Heggen, H., John, P. R., Kojouharov, I, Kurz, N., Singh, B. S. Nara, Pietri, S., Podolyak, Zs, Rudigier, M., Sahin, E., Schaffner, H., Scheidenberger, C., Sharma, A., Vesic, J., Weick, H., Wollersheim, H. J., Ahmed, U., Aktas, O., Algora, A., Appleton, C., Benito, J., Blazhev, A., Bracco, A., Bruce, A., Brunet, M., Canavan, R., Esmaylzadeh, A., Fraile, L. M., Grawe, H., Haefner, G., Kahl, D., Karayonchev, V, Kern, R., Kosir, G., Lozeva, R., Napiralla, P., Page, R., Petrache, C. M., Petrovic, J., Pietralla, N., Regis, J-M, Ruotsalainen, P., Sexton, L., Sanchez-Temble, V, Si, M., Vilhena, J., Werner, V, Wiederhold, J., Witt, W., Woods, P., and Zimba, G.
Abstract: This paper reports preliminary results of the DESPEC campaign at GSI, focused on the study of neutron-deficient nuclei approaching Sn-100. The results presented show the isomeric decays of excited states with I-pi = 14(+) and 8(+) in Pd-96 and Pd-94, respectively. The detailed characterisation of the DESPEC set-up and analysis methodologies, proven in this experimental run, are crucial for the future campaigns.
Published: 2021

10. The (6(+)) isomer in Sn-102 revisited : Neutron and proton effective charges close to the double shell closure

Author: Grawe, H., Faestermann, T., Atac, A., Strmen, P., Grawe, H., Faestermann, T., Atac, A., and Strmen, P.
Abstract: In a high-energy fragmentation experiment at GSI an I-pi = (6(+)) isomer and its gamma-decay are identified in Sn-102, the two-neutron neighbour of the doubly-magic Sn-100. Its half-life is measured to be T-1/2 = 367(11) ns. The possible existence of further isomers is discussed in the framework of large-scale shell model (LSSM) calculations including up to five particle-hole excitations of the Sn-100 core. From the precise B(E2; 6(+) -> 4(+)) strength and the recently remeasured value for B(E2; 8(+) -> 6(+)) in the two-proton hole neighbour Cd-98 effective E2 polarization charges for protons and neutrons were inferred including LSSM corrections within the full N=4 0h omega space. The results are discussed in comparison to predicted and empirically determined effective operators., QC 20211206
Published: 2021
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11. DESPEC Phase-0 campaign at GSI

Author: Polettini, M., Jazrawi, S., Chishti, M. M. R., Yaneva, A., Das, B., Banerjee, A., Hubbard, N., Mistry, A. K., Albers, H. M., Shearman, R., Gorska, M., Gerl, J., Regan, P. H., Cederwall, B., Jolie, J., Alhomaidhi, S., Arici, T., Benzoni, G., Boutachkov, P., Davinson, T., Dickel, T., Haettner, E., Hall, O., Heggen, H., John, P. R., Kojouharov, I, Kurz, N., Singh, B. S. Nara, Pietri, S., Podolyak, Zs, Rudigier, M., Sahin, E., Schaffner, H., Scheidenberger, C., Sharma, A., Vesic, J., Weick, H., Wollersheim, H. J., Ahmed, U., Aktas, O., Algora, A., Appleton, C., Benito, J., Blazhev, A., Bracco, A., Bruce, A., Brunet, M., Canavan, R., Esmaylzadeh, A., Fraile, L. M., Grawe, H., Haefner, G., Kahl, D., Karayonchev, V, Kern, R., Kosir, G., Lozeva, R., Napiralla, P., Page, R., Petrache, C. M., Petrovic, J., Pietralla, N., Regis, J-M, Ruotsalainen, P., Sexton, L., Sanchez-Temble, V, Si, M., Vilhena, J., Werner, V, Wiederhold, J., Witt, W., Woods, P., Zimba, G., Polettini, M., Jazrawi, S., Chishti, M. M. R., Yaneva, A., Das, B., Banerjee, A., Hubbard, N., Mistry, A. K., Albers, H. M., Shearman, R., Gorska, M., Gerl, J., Regan, P. H., Cederwall, B., Jolie, J., Alhomaidhi, S., Arici, T., Benzoni, G., Boutachkov, P., Davinson, T., Dickel, T., Haettner, E., Hall, O., Heggen, H., John, P. R., Kojouharov, I, Kurz, N., Singh, B. S. Nara, Pietri, S., Podolyak, Zs, Rudigier, M., Sahin, E., Schaffner, H., Scheidenberger, C., Sharma, A., Vesic, J., Weick, H., Wollersheim, H. J., Ahmed, U., Aktas, O., Algora, A., Appleton, C., Benito, J., Blazhev, A., Bracco, A., Bruce, A., Brunet, M., Canavan, R., Esmaylzadeh, A., Fraile, L. M., Grawe, H., Haefner, G., Kahl, D., Karayonchev, V, Kern, R., Kosir, G., Lozeva, R., Napiralla, P., Page, R., Petrache, C. M., Petrovic, J., Pietralla, N., Regis, J-M, Ruotsalainen, P., Sexton, L., Sanchez-Temble, V, Si, M., Vilhena, J., Werner, V, Wiederhold, J., Witt, W., Woods, P., and Zimba, G.
Abstract: This paper reports preliminary results of the DESPEC campaign at GSI, focused on the study of neutron-deficient nuclei approaching Sn-100. The results presented show the isomeric decays of excited states with I-pi = 14(+) and 8(+) in Pd-96 and Pd-94, respectively. The detailed characterisation of the DESPEC set-up and analysis methodologies, proven in this experimental run, are crucial for the future campaigns.
Published: 2021

12. The (6(+)) isomer in Sn-102 revisited: Neutron and proton effective charges close to the double shell closure

Author: Grawe, H., Straub, K., Faestermann, T., Gorska, M., Hinke, C., Kruecken, R., Nowacki, F., Boehmer, M., Boutachkov, P., Geissel, H., Gernhaeuser, R., Gottardo, A., Grebosz, J., Kurz, N., Liu, Z., Maier, L., Pietri, S., Podolyak, Zs, Steiger, K., Weick, H., Wollersheim, H. J., Woods, P. J., Al-Dahan, N., Alkhomashi, N., Atac, A., Blazhev, A., Braun, N., Celikovic, I, Davinson, T., Dillmann, I, Domingo-Pardo, C., Doornenbal, P., Farrelly, G., Farinon, F., de France, G., Gerl, J., Goel, N., Habermann, T., Hoischen, R., Janik, R., Karny, M., Kaskas, A., Kojouharov, I, Kroell, Th, Lewitowicz, M., Litvinov, Yu A., Myalski, S., Nebel, F., Nishimura, S., Nociforo, C., Nyberg, J., Parikh, A., Prochazka, A., Regan, P. H., Rigollet, C., Schaffner, H., Scheidenberger, C., Schwertel, S., Soderstrom, P-A, Steer, S., Stolz, A., Strmen, P., Grawe, H., Straub, K., Faestermann, T., Gorska, M., Hinke, C., Kruecken, R., Nowacki, F., Boehmer, M., Boutachkov, P., Geissel, H., Gernhaeuser, R., Gottardo, A., Grebosz, J., Kurz, N., Liu, Z., Maier, L., Pietri, S., Podolyak, Zs, Steiger, K., Weick, H., Wollersheim, H. J., Woods, P. J., Al-Dahan, N., Alkhomashi, N., Atac, A., Blazhev, A., Braun, N., Celikovic, I, Davinson, T., Dillmann, I, Domingo-Pardo, C., Doornenbal, P., Farrelly, G., Farinon, F., de France, G., Gerl, J., Goel, N., Habermann, T., Hoischen, R., Janik, R., Karny, M., Kaskas, A., Kojouharov, I, Kroell, Th, Lewitowicz, M., Litvinov, Yu A., Myalski, S., Nebel, F., Nishimura, S., Nociforo, C., Nyberg, J., Parikh, A., Prochazka, A., Regan, P. H., Rigollet, C., Schaffner, H., Scheidenberger, C., Schwertel, S., Soderstrom, P-A, Steer, S., Stolz, A., and Strmen, P.
Abstract: In a high-energy fragmentation experiment at GSI an I-pi = (6(+)) isomer and its gamma-decay are identified in Sn-102, the two-neutron neighbour of the doubly-magic Sn-100. Its half-life is measured to be T-1/2 = 367(11) ns. The possible existence of further isomers is discussed in the framework of large-scale shell model (LSSM) calculations including up to five particle-hole excitations of the Sn-100 core. From the precise B(E2; 6(+) -> 4(+)) strength and the recently remeasured value for B(E2; 8(+) -> 6(+)) in the two-proton hole neighbour Cd-98 effective E2 polarization charges for protons and neutrons were inferred including LSSM corrections within the full N=4 0h omega space. The results are discussed in comparison to predicted and empirically determined effective operators. (C) 2021 The Author(s). Published by Elsevier B.V.
Published: 2021

13. New beta-decaying state in Bi-214

Author: Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Lica, R., Naidja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D., V, Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I, Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V, Rahkila, P., Rapisarda, E., Rezynkina, K., Sanchez-Tembleque, V, Schomacker, K., Seliverstov, M. D., Sotty, C., Stan, L., Surder, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., Warr, N., Andel, B., Van Duppen, P., Andreyev, A. N., Blazhev, A., Grawe, H., Lica, R., Naidja, H., Stryjczyk, M., Algora, A., Antalic, S., Barzakh, A., Benito, J., Benzoni, G., Berry, T., Borge, M. J. G., Chrysalidis, K., Clisu, C., Costache, C., Cubiss, J. G., De Witte, H., Fedorov, D., V, Fedosseev, V. N., Fraile, L. M., Fynbo, H. O. U., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Illana, A., Jolie, J., Judson, D. S., Konki, J., Lazarus, I, Madurga, M., Marginean, N., Marginean, R., Mihai, C., Marsh, B. A., Molkanov, P., Mosat, P., Murias, J. R., Nacher, E., Negret, A., Page, R. D., Pascu, S., Perea, A., Pucknell, V, Rahkila, P., Rapisarda, E., Rezynkina, K., Sanchez-Tembleque, V, Schomacker, K., Seliverstov, M. D., Sotty, C., Stan, L., Surder, C., Tengblad, O., Vedia, V., Vinals, S., Wadsworth, R., and Warr, N.
Abstract: A new beta-decaying state in Bi-214 has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred I-pi = (8(-)) assignment was suggested for this state based on the beta-decay feeding pattern to levels in Po-214 and shell-model calculations. The half-life of the I-pi = (8) state was deduced to be T-1/2 = 9.39(10) min. The deexcitation of the levels populated in Po-214 by the beta decay of this state was investigated via gamma-gamma coincidences and a number of new levels and transitions was identified. Shell-model calculations for excited states in Bi-214 and Po-214 were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new beta-decaying state as an I-pi = 8 - isomer and allow for tentative assignment of shell-model states to several high-spin states in Po-214.
Published: 2021

14. This title is unavailable for guests, please login to see more information.

Author: Park, J, Krücken, R, Blazhev, A, Lubos, D, Gernhäuser, R, Lewitowicz, M, Nishimura, S, Ahn, D S, Baba, H, Blank, B, Boutachkov, P, Browne, F, Čeliković, Igor T., de France, G., Doornenbal, P, Faestermann, T, Fang, Y, Fukuda, N, Giovinazzo, J, Goel, N, Górska, M, Grawe, H, Ilieva, S, Inabe, N, Isobe, T, Jungclaus, A, Kameda, D, Kim, G. D., Kim, Y.-K., Kojouharov, I, Kubo, T, Kurz, N, Kwon, Y K, Lorusso, G, Moschner, K, Murai, D, Nishizuka, I, Patel, Z, Rajabali, M M, Rice, S, Sakurai, H, Schaffner, H, Shimizu, Y, Sinclair, L, Söderström, P.-A., Steiger, K, Sumikama, T, Suzuki, H, Takeda, H, Wang, Z, Watanabe, H, Wu, J, Xu, Z Y, Park, J, Krücken, R, Blazhev, A, Lubos, D, Gernhäuser, R, Lewitowicz, M, Nishimura, S, Ahn, D S, Baba, H, Blank, B, Boutachkov, P, Browne, F, Čeliković, Igor T., de France, G., Doornenbal, P, Faestermann, T, Fang, Y, Fukuda, N, Giovinazzo, J, Goel, N, Górska, M, Grawe, H, Ilieva, S, Inabe, N, Isobe, T, Jungclaus, A, Kameda, D, Kim, G. D., Kim, Y.-K., Kojouharov, I, Kubo, T, Kurz, N, Kwon, Y K, Lorusso, G, Moschner, K, Murai, D, Nishizuka, I, Patel, Z, Rajabali, M M, Rice, S, Sakurai, H, Schaffner, H, Shimizu, Y, Sinclair, L, Söderström, P.-A., Steiger, K, Sumikama, T, Suzuki, H, Takeda, H, Wang, Z, Watanabe, H, Wu, J, and Xu, Z Y
Published: 2020

15. Octupole states in Tl-207 studied through beta decay

Author: Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Brown, B. A., Grawe, H., Sotty, Ch, Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Cresswell, J. R., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gamba, E., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kowalska, M., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nae, S., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Simpson, E. C., Stegemann, S., Stora, T., Tengblad, O., Turturica, A., Van Duppen, P., Vedia, V., Walker, P. M., Warr, N., Wearing, F. P., De Witte, H., Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Brown, B. A., Grawe, H., Sotty, Ch, Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Cresswell, J. R., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gamba, E., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kowalska, M., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nae, S., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Simpson, E. C., Stegemann, S., Stora, T., Tengblad, O., Turturica, A., Van Duppen, P., Vedia, V., Walker, P. M., Warr, N., Wearing, F. P., and De Witte, H.
Abstract: The beta decay of Hg-207 into the single-proton-hole nucleus Tl-207 has been studied through gamma-ray spectroscopy at the ISOLDE Decay Station (IDS) with the aim of identifying states resulting from coupling of the pi s(1/2)(-1), pi d(3/2)(-1) and pi h(11/2)(-1) shell model orbitals to the collective octupole vibration. Twenty-two states were observed lying between 2.6 and 4.0 MeV, eleven of which were observed for the first time, and 78 new transitions were placed. Two octupole states (s(3/2)-coupled) are identified and three more states (d(3/2)-coupled) are tentatively assigned using spin-parity inferences, while further h(11/2)-coupled states may also have been observed for the first time. Comparisons are made with state-of-the-art large-scale shell model calculations and previous observations made in this region, and systematic underestimation of the energy of the octupole vibrational states is noted. We suggest that in order to resolve the difference in predicted energies for collective and noncollective t = 1 states (t is the number of nucleons breaking the Pb-208 core), the effect of t = 2 mixing may be reduced for octupole-coupled states. The inclusion of mixing with t = 0, 2, 3 excitations is necessary to replicate all t = 1 state energies accurately.
Published: 2020

16. Spectroscopy of Cd-99 and In-101 from beta decays of In-99 and Sn-101

Author: Park, J., Kruecken, R., Blazhev, A., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Kruecken, R., Blazhev, A., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: We report on new gamma-ray spectroscopy results from beta decays of In-99 and Sn-101. 30 new gamma rays were observed following the beta decay of In-99, and inconsistencies in the literature with respect to the gamma rays following the beta decay of Sn-101 were addressed with two confirmed cases and two new transitions. The experimental gamma-ray energies, intensities, and coincidence relationships are discussed with shell model calculations, where theoretical beta-decay branching ratios from the parent nuclei and gamma-ray cascades of excited states from the daughter nuclei were combined to generate hypothetical beta gamma spectra and beta gamma gamma coincidence matrices. The most intense beta-delayed gamma-ray branches in both Cd-99 and In-101 were well reproduced with this approach, and several gamma rays were assigned to new excited states based on their good agreement with shell model predictions.
Published: 2020

17. Competition between Allowed and First-Forbidden beta Decay: The Case of Hg-208 -> Tl-2(0)8

Author: Carroll, R. J., Podolyak, Zs, Berry, T., Grawe, H., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Creswell, J. R., Fraile, L. M., Fahlander, C., Fynbo, H. O. U., Gamba, E. R., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I. H., Lica, R., Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Stegemann, S., Stora, T., Sotty, Ch, Tengblad, O., Van Duppen, P., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., De Witte, H., Carroll, R. J., Podolyak, Zs, Berry, T., Grawe, H., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Creswell, J. R., Fraile, L. M., Fahlander, C., Fynbo, H. O. U., Gamba, E. R., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I. H., Lica, R., Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Stegemann, S., Stora, T., Sotty, Ch, Tengblad, O., Van Duppen, P., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., and De Witte, H.
Abstract: The beta decay of Hg-208 into the one-proton hole, one neutron-particle Tl-208(81)127 nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well the level scheme deduced, validating the proton-neutron interactions used, with implications for the whole of the N > 126, Z < 82 quadrant of neutron-rich nuclei. While both negative and positive parity states with spin 0 and 1 are expected within the Q(beta) window, only three negative parity states are populated directly in the beta decay. The data provide a unique test of the competition between allowed Gamow-Teller and Fermi, and first-forbidden beta decays, essential for the understanding of the nucleosynthesis of heavy nuclei in the rapid neutron capture process. Furthermore, the observation of the parity changing 0(+) -> 0(-)beta decay where the daughter state is core excited is unique, and can provide information on mesonic corrections of effective operators.
Published: 2020

18. Octupole states in Tl-207 studied through beta decay

Author: Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Brown, B. A., Grawe, H., Sotty, Ch, Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Cresswell, J. R., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gamba, E., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kowalska, M., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nae, S., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Simpson, E. C., Stegemann, S., Stora, T., Tengblad, O., Turturica, A., Van Duppen, P., Vedia, V., Walker, P. M., Warr, N., Wearing, F. P., De Witte, H., Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Brown, B. A., Grawe, H., Sotty, Ch, Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Cresswell, J. R., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gamba, E., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kowalska, M., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nae, S., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Simpson, E. C., Stegemann, S., Stora, T., Tengblad, O., Turturica, A., Van Duppen, P., Vedia, V., Walker, P. M., Warr, N., Wearing, F. P., and De Witte, H.
Abstract: The beta decay of Hg-207 into the single-proton-hole nucleus Tl-207 has been studied through gamma-ray spectroscopy at the ISOLDE Decay Station (IDS) with the aim of identifying states resulting from coupling of the pi s(1/2)(-1), pi d(3/2)(-1) and pi h(11/2)(-1) shell model orbitals to the collective octupole vibration. Twenty-two states were observed lying between 2.6 and 4.0 MeV, eleven of which were observed for the first time, and 78 new transitions were placed. Two octupole states (s(3/2)-coupled) are identified and three more states (d(3/2)-coupled) are tentatively assigned using spin-parity inferences, while further h(11/2)-coupled states may also have been observed for the first time. Comparisons are made with state-of-the-art large-scale shell model calculations and previous observations made in this region, and systematic underestimation of the energy of the octupole vibrational states is noted. We suggest that in order to resolve the difference in predicted energies for collective and noncollective t = 1 states (t is the number of nucleons breaking the Pb-208 core), the effect of t = 2 mixing may be reduced for octupole-coupled states. The inclusion of mixing with t = 0, 2, 3 excitations is necessary to replicate all t = 1 state energies accurately.
Published: 2020

19. Spectroscopy of Cd-99 and In-101 from beta decays of In-99 and Sn-101

Author: Park, J., Kruecken, R., Blazhev, A., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Kruecken, R., Blazhev, A., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: We report on new gamma-ray spectroscopy results from beta decays of In-99 and Sn-101. 30 new gamma rays were observed following the beta decay of In-99, and inconsistencies in the literature with respect to the gamma rays following the beta decay of Sn-101 were addressed with two confirmed cases and two new transitions. The experimental gamma-ray energies, intensities, and coincidence relationships are discussed with shell model calculations, where theoretical beta-decay branching ratios from the parent nuclei and gamma-ray cascades of excited states from the daughter nuclei were combined to generate hypothetical beta gamma spectra and beta gamma gamma coincidence matrices. The most intense beta-delayed gamma-ray branches in both Cd-99 and In-101 were well reproduced with this approach, and several gamma rays were assigned to new excited states based on their good agreement with shell model predictions.
Published: 2020

20. Competition between Allowed and First-Forbidden beta Decay: The Case of Hg-208 -> Tl-2(0)8

Author: Carroll, R. J., Podolyak, Zs, Berry, T., Grawe, H., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Creswell, J. R., Fraile, L. M., Fahlander, C., Fynbo, H. O. U., Gamba, E. R., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I. H., Lica, R., Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Stegemann, S., Stora, T., Sotty, Ch, Tengblad, O., Van Duppen, P., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., De Witte, H., Carroll, R. J., Podolyak, Zs, Berry, T., Grawe, H., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Brunet, M., Creswell, J. R., Fraile, L. M., Fahlander, C., Fynbo, H. O. U., Gamba, E. R., Gelletly, W., Gerst, R-B, Gorska, M., Gredley, A., Greenlees, P. T., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I. H., Lica, R., Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Negret, A., Nita, C., Pascu, S., Page, R. D., Patel, Z., Perea, A., Phrompao, J., Piersa, M., Pucknell, V, Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Rudigier, M., Shand, C. M., Shearman, R., Stegemann, S., Stora, T., Sotty, Ch, Tengblad, O., Van Duppen, P., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., and De Witte, H.
Abstract: The beta decay of Hg-208 into the one-proton hole, one neutron-particle Tl-208(81)127 nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well the level scheme deduced, validating the proton-neutron interactions used, with implications for the whole of the N > 126, Z < 82 quadrant of neutron-rich nuclei. While both negative and positive parity states with spin 0 and 1 are expected within the Q(beta) window, only three negative parity states are populated directly in the beta decay. The data provide a unique test of the competition between allowed Gamow-Teller and Fermi, and first-forbidden beta decays, essential for the understanding of the nucleosynthesis of heavy nuclei in the rapid neutron capture process. Furthermore, the observation of the parity changing 0(+) -> 0(-)beta decay where the daughter state is core excited is unique, and can provide information on mesonic corrections of effective operators.
Published: 2020

21. This title is unavailable for guests, please login to see more information.

Author: Park, J., Krucken, Reiner, Lubos, D., Gernhäuser, Roman, Lewitowicz, Marek, Nishimura, S., Ahn, Deuk Soon, Baba, Hidetada, Blank, Bertram B., Blazhev, A., Boutachkov, P, Browne, F, Čeliković, Igor T., de France, G., Doornenbal, P, Faestermann, T, Fang, Y, Fukuda, N, Giovinazzo, J, Goel, N, Górska, M, Grawe, H, Ilieva, S, Inabe, N, Isobe, T, Jungclaus, A, Kameda, D, Kim, G. D., Kim, Y.-K., Kojouharov, I, Kubo, T, Kurz, N, Kwon, Y K, Lorusso, G, Moschner, K, Murai, D, Nishizuka, I, Patel, Z, Rajabali, M M, Rice, S, Sakurai, H, Schaffner, H, Shimizu, Y, Sinclair, L, Söderström, P.-A., Steiger, K, Sumikama, T, Suzuki, H, Takeda, H, Wang, Z, Watanabe, H, Wu, J, Xu, Z Y, Park, J., Krucken, Reiner, Lubos, D., Gernhäuser, Roman, Lewitowicz, Marek, Nishimura, S., Ahn, Deuk Soon, Baba, Hidetada, Blank, Bertram B., Blazhev, A., Boutachkov, P, Browne, F, Čeliković, Igor T., de France, G., Doornenbal, P, Faestermann, T, Fang, Y, Fukuda, N, Giovinazzo, J, Goel, N, Górska, M, Grawe, H, Ilieva, S, Inabe, N, Isobe, T, Jungclaus, A, Kameda, D, Kim, G. D., Kim, Y.-K., Kojouharov, I, Kubo, T, Kurz, N, Kwon, Y K, Lorusso, G, Moschner, K, Murai, D, Nishizuka, I, Patel, Z, Rajabali, M M, Rice, S, Sakurai, H, Schaffner, H, Shimizu, Y, Sinclair, L, Söderström, P.-A., Steiger, K, Sumikama, T, Suzuki, H, Takeda, H, Wang, Z, Watanabe, H, Wu, J, and Xu, Z Y
Published: 2019

22. Properties of gamma-decaying isomers in the Sn-100 region populated in fragmentation of a Xe-124 beam

Author: Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanbe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanbe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinaga, K., and Zhu, Y.
Abstract: A systematic study was performed of microsecond gamma-decaying isomers around Sn-100 produced in a fragmentation reaction of a Xe-124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh-92 and Ag-96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.
Published: 2019
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23. Properties of γ-decaying Isomers in the 100Sn Region Revisited

Author: Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanabe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinagai, K., Zhui, Y., Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanabe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinagai, K., and Zhui, Y.
Abstract: The study of nuclei in the region around the N = Z doubly-magic nucleus 100Sn has been of long standing interest for the nuclear structure and nuclear astrophysics. Recently, Park et al. have reported on properties of γ-decaying isomers and isomeric ratios in the vicinity of 100Sn. That experiment was performed at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center in Japan as a part of the EURICA campaign. Neutron-deficient nuclei were produced in a fragmentation reaction of a 124Xe primary beam on a 9Be target at an energy of 345 MeV/A. Secondary ions were separated and identified in the BigRIPS fragment separator and implanted in the silicon detector array WAS3ABi. The data presented here were obtained in another experiment performed at the RIBF using the same reaction but slightly different separator settings. New results of ratios of isomeric population and half-lives of γ-decaying isomers populated in the experiment are presented., Wos title: PROPERTIES OF gamma-DECAYING ISOMERS IN THE Sn-100 REGION REVISITED
Published: 2019
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24. Toward the limit of nuclear binding on the N = Z line : Spectroscopy of Cd-96

Author: Davies, P. J., Park, J., Grawe, H., Wadsworth, R., Gernhauser, R., Krucken, R., Nowacki, F., Ahn, D. S., Ameil, F., Baba, H., Bäck, T., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, Dewald, M., Doornenbal, P., Faestermann, T., Fang, Y., de France, G., Fukuda, N., Gengelbach, Aila, Gerl, J., Giovinazzo, J., Go, S., Goel, N., Gorska, M., Gregor, E., Hotaka, H., Ilieva, S., Inabe, N., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Lewitowicz, M., Lorusso, G., Lubos, D., Maier, L., Merchan, E., Moschner, K., Murai, D., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nishizuka, I, Patel, Z., Pietralla, N., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L. F., Soederstroem, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Taprogge, J., Thöle, P., Valder, S., Wang, Z., Warr, N., Watanabe, H., Werner, V, Wu, J., Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., Davies, P. J., Park, J., Grawe, H., Wadsworth, R., Gernhauser, R., Krucken, R., Nowacki, F., Ahn, D. S., Ameil, F., Baba, H., Bäck, T., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, Dewald, M., Doornenbal, P., Faestermann, T., Fang, Y., de France, G., Fukuda, N., Gengelbach, Aila, Gerl, J., Giovinazzo, J., Go, S., Goel, N., Gorska, M., Gregor, E., Hotaka, H., Ilieva, S., Inabe, N., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Lewitowicz, M., Lorusso, G., Lubos, D., Maier, L., Merchan, E., Moschner, K., Murai, D., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nishizuka, I, Patel, Z., Pietralla, N., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L. F., Soederstroem, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Taprogge, J., Thöle, P., Valder, S., Wang, Z., Warr, N., Watanabe, H., Werner, V, Wu, J., Xu, Z. Y., Yagi, A., Yoshinaga, K., and Zhu, Y.
Abstract: A gamma -decaying isomeric state (tau(1/2) = 197(-17)(+19) ns) has been identified in Cd-96, which is one alpha particle away from the last known bound N = Z nucleus, Sn-100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T = 0) and isovector (T = 1) neutron-proton pairs. The data also suggest evidence for the population of a 9(+) T = 1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T = 1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T = 0 and T = 1 neutron-proton pairs.
Published: 2019
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25. Properties of γ-decaying isomers in the Sn 100 region populated in fragmentation of a Xe 124 beam

Author: Häfner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Bäck, Torbjörn, Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaüser, R., Go, S., Górska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Söderström, P. -A, Steiger, K., Sumikama, T., Taprogge, J., Thöle, P., Watanbe, H., Warr, N., Werner, V., Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., Häfner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Bäck, Torbjörn, Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaüser, R., Go, S., Górska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Söderström, P. -A, Steiger, K., Sumikama, T., Taprogge, J., Thöle, P., Watanbe, H., Warr, N., Werner, V., Xu, Z. Y., Yagi, A., Yoshinaga, K., and Zhu, Y.
Abstract: A systematic study was performed of microsecond γ-decaying isomers around Sn100 produced in a fragmentation reaction of a Xe124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh92 and Ag96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction., QC 20191016
Published: 2019
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26. New and comprehensive beta- and beta p-decay spectroscopy results in the vicinity of Sn-100

Author: Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Pate, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Pate, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: A decay spectroscopy experiment on proton-rich nuclei in the vicinity of the doubly magic Sn-100 was carried out at RIKEN Nishina Center. More than 20 nuclei with 43 <= Z <= 50 and N <= 51, produced by fragmentation reactions were investigated via analyses of beta-decay, beta p-decay, and subsequent gamma-ray data. Owing to higher statistics, the precision on the half-lives of many of the ground states and isomers was improved. beta-decay endpoint energies of 11 states in 8 nuclei were measured for the first time, and the corresponding Q(EC) and excitation energies were generally consistent with various mass models. Many beta-delayed proton emission branching ratios were measured either for the first time or with higher precision compared to literature values, and some of them differed by more than 2 sigma. Many of the large discrepancies were associated with nuclei with long-lived isomeric states, highlighting large systematic uncertainties involved in these measurements. Twenty-five new gamma rays were observed, and ten new states are proposed with unambiguous excitation energies, spins, and parities. Most of the energies of the excited states were consistent within 300 keV or 20%, whichever was greater, compared to shell model predictions in the proton/neutron (P-1/2, g(9/2)) model space assuming a Sr-76 core. A signature of a new (1/2(-)) isomer in Cd-97 with T-1/2 = 0.73(7) s was found, in good agreement with shell model predictions.
Published: 2019

27. New and comprehensive beta- and beta p-decay spectroscopy results in the vicinity of Sn-100

Author: Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Pate, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Pate, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: A decay spectroscopy experiment on proton-rich nuclei in the vicinity of the doubly magic Sn-100 was carried out at RIKEN Nishina Center. More than 20 nuclei with 43 <= Z <= 50 and N <= 51, produced by fragmentation reactions were investigated via analyses of beta-decay, beta p-decay, and subsequent gamma-ray data. Owing to higher statistics, the precision on the half-lives of many of the ground states and isomers was improved. beta-decay endpoint energies of 11 states in 8 nuclei were measured for the first time, and the corresponding Q(EC) and excitation energies were generally consistent with various mass models. Many beta-delayed proton emission branching ratios were measured either for the first time or with higher precision compared to literature values, and some of them differed by more than 2 sigma. Many of the large discrepancies were associated with nuclei with long-lived isomeric states, highlighting large systematic uncertainties involved in these measurements. Twenty-five new gamma rays were observed, and ten new states are proposed with unambiguous excitation energies, spins, and parities. Most of the energies of the excited states were consistent within 300 keV or 20%, whichever was greater, compared to shell model predictions in the proton/neutron (P-1/2, g(9/2)) model space assuming a Sr-76 core. A signature of a new (1/2(-)) isomer in Cd-97 with T-1/2 = 0.73(7) s was found, in good agreement with shell model predictions.
Published: 2019

28. PROPERTIES OF gamma-DECAYING ISOMERS IN THE Sn-100 REGION REVISITED

Author: Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanabe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinagai, K., Zhui, Y., Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanabe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinagai, K., and Zhui, Y.
Abstract: The study of nuclei in the region around the N = Z doubly-magic nucleus Sn-100 has been of long standing interest for the nuclear structure and nuclear astrophysics. Recently, Park et al. have reported on properties of gamma-decaying isomers and isomeric ratios in the vicinity of Sn-100. That experiment was performed at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center in Japan as a part of the EURICA campaign. Neutron-deficient nuclei were produced in a fragmentation reaction of a Xe-124 primary beam on a 9 Be target at an energy of 345 MeV/A. Secondary ions were separated and identified in the BigRIPS fragment separator and implanted in the silicon detector array WAS3ABi. The data presented here were obtained in another experiment performed at the RIBF using the same reaction but slightly different separator settings. New results of ratios of isomeric population and half-lives of gamma-decaying isomers populated in the experiment are presented.
Published: 2019

29. Properties of gamma-decaying isomers in the Sn-100 region populated in fragmentation of a Xe-124 beam

Author: Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanbe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanbe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinaga, K., and Zhu, Y.
Abstract: A systematic study was performed of microsecond gamma-decaying isomers around Sn-100 produced in a fragmentation reaction of a Xe-124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh-92 and Ag-96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.
Published: 2019

30. Spectroscopy and excited-state g factors in weakly collective Cd-111: Confronting collective and microscopic models

Author: Coombes, B. J., Stuchbery, A. E., Blazhev, A., Grawe, H., Reed, M. W., Akber, A., Dowie, J. T. H., Gerathy, M. S. M., Gray, T. J., Kibedi, T., Mitchell, A. J., Palazzo, T., Coombes, B. J., Stuchbery, A. E., Blazhev, A., Grawe, H., Reed, M. W., Akber, A., Dowie, J. T. H., Gerathy, M. S. M., Gray, T. J., Kibedi, T., Mitchell, A. J., and Palazzo, T.
Abstract: Background: The even cadmium isotopes near the neutron midshell have long been considered among the best examples of vibrational nuclei. However, the vibrational nature of these nuclei has been questioned based on E2 transition rates that are not consistent with vibrational excitations. In the neighboring odd-mass nuclei, the g factors of the low-excitation collective states have been shown to be more consistent with a deformed rotational core than a vibrational core. Moving beyond the comparison of vibrational versus rotational models, recent advances in computational power have made shell-model calculations feasible for Cd isotopes. These calculations may give insights into the emergence and nature of collectivity in the Cd isotopes. Purpose: To investigate the nature of collective excitations in the A approximate to 100 region through experimental and theoretical studies of magnetic moments and electromagnetic transitions in Cd-111. Method: The spectroscopy of Cd-111 has been studied following Coulomb excitation. Angular correlation measurements, transient-field g-factor measurements and lifetime measurements by the Doppler-broadened line shape method were performed. The structure of the nucleus was explored in relation to particle-vibration versus particle-rotor interpretations. Large-scale shell-model calculations were performed with the SR88MHJM Hamiltonian. Results: Excited-state g factors have been measured, spin assignments examined, and lifetimes determined. Attention was given to the reported 5/2(+) 753-keV and 3/2(+) 755-keV states. The 3/2(+) 755-keV level was not observed; evidence is presented that the reported 3/2(+) state was a misidentification of the 5/2(+) 753-keV state. Conclusions: It is shown that the g factors and level structure of Cd-111 are not readily explained by the particle-vibration model. A particle-rotor approach has both successes and limitations. The shell-model approach successfully reproduces much of the known low-excitation str
Published: 2019

31. Investigation of the Delta n=0 selection rule in Gamow-Teller transitions: The beta-decay of Hg-207

Author: Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Grawe, H., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Creswell, J., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gelletly, W., Gerst, R-b, Gorska, M., Gredley, A., Greenlees, R., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Nae, S., Negret, A., Nita, C., Page, R. D., Pascu, S., Patel, Z., Perea, A., Pucknell, V, Rahkila, R., Rapisarda, E., Regan, P. H., Rotaru, F., Shand, C. M., Simpson, E. C., Sotty, Ch, Stegemann, S., Stora, T., Tengblad, O., Turturicag, A., Van Duppen, R., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., De Witte, H., Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Grawe, H., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Creswell, J., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gelletly, W., Gerst, R-b, Gorska, M., Gredley, A., Greenlees, R., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Nae, S., Negret, A., Nita, C., Page, R. D., Pascu, S., Patel, Z., Perea, A., Pucknell, V, Rahkila, R., Rapisarda, E., Regan, P. H., Rotaru, F., Shand, C. M., Simpson, E. C., Sotty, Ch, Stegemann, S., Stora, T., Tengblad, O., Turturicag, A., Van Duppen, R., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., and De Witte, H.
Abstract: Gamow-Teller beta decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Delta n = 0 requirement plays a major role in the beta decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z = 50 (for N > 82) and Z = 82 (for N > 126). The level of forbiddenness of the Delta n = 1 nu 1g(9/2) -> pi 0g(7/2) transition has been investigated from the beta(-) decay of the ground state of Hg-207 into the single-proton-hole nucleus Tl-207 in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible gamma-ray transitions depopulating the pi 0g(7/2)(-1) state in Tl-207, an upper limit of 3.9 x 10(-3)% was obtained for the probability of this decay, corresponding to log ft > 8.8 within within a 95% confidence limit. This is the most stringent test of the Delta n = 0 selection rule to date. (C) 2019 The Authors. Published by Elsevier B.V.
Published: 2019

32. Spectroscopy and excited-state g factors in weakly collective Cd 111: Confronting collective and microscopic models

Author: Coombes, Ben, Stuchbery, Andrew, Blazhev, A., Grawe, H., Reed, Matthew, Akber, Aqeel, Dowie, Jackson, Gerathy, Matthew, Gray, Timothy, Kibedi, Tibor, Mitchell, Alan, Palazzo, Thomas, Coombes, Ben, Stuchbery, Andrew, Blazhev, A., Grawe, H., Reed, Matthew, Akber, Aqeel, Dowie, Jackson, Gerathy, Matthew, Gray, Timothy, Kibedi, Tibor, Mitchell, Alan, and Palazzo, Thomas
Abstract: Background: The even cadmium isotopes near the neutron midshell have long been considered among the best examples of vibrational nuclei. However, the vibrational nature of these nuclei has been questioned based on E2 transition rates that are not consistent with vibrational excitations. In the neighboring odd-mass nuclei, the g factors of the low-excitation collective states have been shown to be more consistent with a deformed rotational core than a vibrational core. Moving beyond the comparison of vibrational versus rotational models, recent advances in computational power have made shell-model calculations feasible for Cd isotopes. These calculations may give insights into the emergence and nature of collectivity in the Cd isotopes.
Published: 2019

33. Toward the limit of nuclear binding on the N = Z line: Spectroscopy of Cd-96

Author: Davies, P. J., Park, J., Grawe, H., Wadsworth, R., Gernhauser, R., Krucken, R., Nowacki, F., Ahn, D. S., Ameil, F., Baba, H., Back, T., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, Dewald, M., Doornenbal, P., Faestermann, T., Fang, Y., de France, G., Fukuda, N., Gengelbach, A., Gerl, J., Giovinazzo, J., Go, S., Goel, N., Gorska, M., Gregor, E., Hotaka, H., Ilieva, S., Inabe, N., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Lewitowicz, M., Lorusso, G., Lubos, D., Maier, L., Merchan, E., Moschner, K., Murai, D., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nishizuka, I, Patel, Z., Pietralla, N., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L. F., Soederstroem, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Taprogge, J., Thoele, P., Valder, S., Wang, Z., Warr, N., Watanabe, H., Werner, V, Wu, J., Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., Davies, P. J., Park, J., Grawe, H., Wadsworth, R., Gernhauser, R., Krucken, R., Nowacki, F., Ahn, D. S., Ameil, F., Baba, H., Back, T., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, Dewald, M., Doornenbal, P., Faestermann, T., Fang, Y., de France, G., Fukuda, N., Gengelbach, A., Gerl, J., Giovinazzo, J., Go, S., Goel, N., Gorska, M., Gregor, E., Hotaka, H., Ilieva, S., Inabe, N., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Lewitowicz, M., Lorusso, G., Lubos, D., Maier, L., Merchan, E., Moschner, K., Murai, D., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nishizuka, I, Patel, Z., Pietralla, N., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L. F., Soederstroem, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Taprogge, J., Thoele, P., Valder, S., Wang, Z., Warr, N., Watanabe, H., Werner, V, Wu, J., Xu, Z. Y., Yagi, A., Yoshinaga, K., and Zhu, Y.
Abstract: A gamma -decaying isomeric state (tau(1/2) = 197(-17)(+19) ns) has been identified in Cd-96, which is one alpha particle away from the last known bound N = Z nucleus, Sn-100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T = 0) and isovector (T = 1) neutron-proton pairs. The data also suggest evidence for the population of a 9(+) T = 1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T = 1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T = 0 and T = 1 neutron-proton pairs.
Published: 2019

34. PROPERTIES OF gamma-DECAYING ISOMERS IN THE Sn-100 REGION REVISITED

Author: Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanabe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinagai, K., Zhui, Y., Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanabe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinagai, K., and Zhui, Y.
Abstract: The study of nuclei in the region around the N = Z doubly-magic nucleus Sn-100 has been of long standing interest for the nuclear structure and nuclear astrophysics. Recently, Park et al. have reported on properties of gamma-decaying isomers and isomeric ratios in the vicinity of Sn-100. That experiment was performed at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center in Japan as a part of the EURICA campaign. Neutron-deficient nuclei were produced in a fragmentation reaction of a Xe-124 primary beam on a 9 Be target at an energy of 345 MeV/A. Secondary ions were separated and identified in the BigRIPS fragment separator and implanted in the silicon detector array WAS3ABi. The data presented here were obtained in another experiment performed at the RIBF using the same reaction but slightly different separator settings. New results of ratios of isomeric population and half-lives of gamma-decaying isomers populated in the experiment are presented.
Published: 2019

35. New and comprehensive beta- and beta p-decay spectroscopy results in the vicinity of Sn-100

Author: Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Pate, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I, de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y-K, Kojouharov, I, Kubo, T., Kurz, N., Kwon, Y. K., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I, Pate, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P-A, Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: A decay spectroscopy experiment on proton-rich nuclei in the vicinity of the doubly magic Sn-100 was carried out at RIKEN Nishina Center. More than 20 nuclei with 43 <= Z <= 50 and N <= 51, produced by fragmentation reactions were investigated via analyses of beta-decay, beta p-decay, and subsequent gamma-ray data. Owing to higher statistics, the precision on the half-lives of many of the ground states and isomers was improved. beta-decay endpoint energies of 11 states in 8 nuclei were measured for the first time, and the corresponding Q(EC) and excitation energies were generally consistent with various mass models. Many beta-delayed proton emission branching ratios were measured either for the first time or with higher precision compared to literature values, and some of them differed by more than 2 sigma. Many of the large discrepancies were associated with nuclei with long-lived isomeric states, highlighting large systematic uncertainties involved in these measurements. Twenty-five new gamma rays were observed, and ten new states are proposed with unambiguous excitation energies, spins, and parities. Most of the energies of the excited states were consistent within 300 keV or 20%, whichever was greater, compared to shell model predictions in the proton/neutron (P-1/2, g(9/2)) model space assuming a Sr-76 core. A signature of a new (1/2(-)) isomer in Cd-97 with T-1/2 = 0.73(7) s was found, in good agreement with shell model predictions.
Published: 2019

36. Properties of gamma-decaying isomers in the Sn-100 region populated in fragmentation of a Xe-124 beam

Author: Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanbe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., Haefner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeuser, R., Go, S., Gorska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I, Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Soderstrom, P-A, Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Watanbe, H., Warr, N., Werner, V, Xu, Z. Y., Yagi, A., Yoshinaga, K., and Zhu, Y.
Abstract: A systematic study was performed of microsecond gamma-decaying isomers around Sn-100 produced in a fragmentation reaction of a Xe-124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh-92 and Ag-96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.
Published: 2019

37. Spectroscopy and excited-state g factors in weakly collective Cd-111: Confronting collective and microscopic models

Author: Coombes, B. J., Stuchbery, A. E., Blazhev, A., Grawe, H., Reed, M. W., Akber, A., Dowie, J. T. H., Gerathy, M. S. M., Gray, T. J., Kibedi, T., Mitchell, A. J., Palazzo, T., Coombes, B. J., Stuchbery, A. E., Blazhev, A., Grawe, H., Reed, M. W., Akber, A., Dowie, J. T. H., Gerathy, M. S. M., Gray, T. J., Kibedi, T., Mitchell, A. J., and Palazzo, T.
Abstract: Background: The even cadmium isotopes near the neutron midshell have long been considered among the best examples of vibrational nuclei. However, the vibrational nature of these nuclei has been questioned based on E2 transition rates that are not consistent with vibrational excitations. In the neighboring odd-mass nuclei, the g factors of the low-excitation collective states have been shown to be more consistent with a deformed rotational core than a vibrational core. Moving beyond the comparison of vibrational versus rotational models, recent advances in computational power have made shell-model calculations feasible for Cd isotopes. These calculations may give insights into the emergence and nature of collectivity in the Cd isotopes. Purpose: To investigate the nature of collective excitations in the A approximate to 100 region through experimental and theoretical studies of magnetic moments and electromagnetic transitions in Cd-111. Method: The spectroscopy of Cd-111 has been studied following Coulomb excitation. Angular correlation measurements, transient-field g-factor measurements and lifetime measurements by the Doppler-broadened line shape method were performed. The structure of the nucleus was explored in relation to particle-vibration versus particle-rotor interpretations. Large-scale shell-model calculations were performed with the SR88MHJM Hamiltonian. Results: Excited-state g factors have been measured, spin assignments examined, and lifetimes determined. Attention was given to the reported 5/2(+) 753-keV and 3/2(+) 755-keV states. The 3/2(+) 755-keV level was not observed; evidence is presented that the reported 3/2(+) state was a misidentification of the 5/2(+) 753-keV state. Conclusions: It is shown that the g factors and level structure of Cd-111 are not readily explained by the particle-vibration model. A particle-rotor approach has both successes and limitations. The shell-model approach successfully reproduces much of the known low-excitation str
Published: 2019

38. Investigation of the Delta n=0 selection rule in Gamow-Teller transitions: The beta-decay of Hg-207

Author: Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Grawe, H., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Creswell, J., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gelletly, W., Gerst, R-b, Gorska, M., Gredley, A., Greenlees, R., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Nae, S., Negret, A., Nita, C., Page, R. D., Pascu, S., Patel, Z., Perea, A., Pucknell, V, Rahkila, R., Rapisarda, E., Regan, P. H., Rotaru, F., Shand, C. M., Simpson, E. C., Sotty, Ch, Stegemann, S., Stora, T., Tengblad, O., Turturicag, A., Van Duppen, R., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., De Witte, H., Berry, T. A., Podolyak, Zs, Carroll, R. J., Lica, R., Grawe, H., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Creswell, J., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gelletly, W., Gerst, R-b, Gorska, M., Gredley, A., Greenlees, R., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I, Lalkovski, S., Lazarus, I, Lund, M., Madurga, M., Marginean, N., Marginean, R., Marroquin, I, Mihai, C., Mihai, R. E., Nacher, E., Nae, S., Negret, A., Nita, C., Page, R. D., Pascu, S., Patel, Z., Perea, A., Pucknell, V, Rahkila, R., Rapisarda, E., Regan, P. H., Rotaru, F., Shand, C. M., Simpson, E. C., Sotty, Ch, Stegemann, S., Stora, T., Tengblad, O., Turturicag, A., Van Duppen, R., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F., and De Witte, H.
Abstract: Gamow-Teller beta decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Delta n = 0 requirement plays a major role in the beta decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z = 50 (for N > 82) and Z = 82 (for N > 126). The level of forbiddenness of the Delta n = 1 nu 1g(9/2) -> pi 0g(7/2) transition has been investigated from the beta(-) decay of the ground state of Hg-207 into the single-proton-hole nucleus Tl-207 in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible gamma-ray transitions depopulating the pi 0g(7/2)(-1) state in Tl-207, an upper limit of 3.9 x 10(-3)% was obtained for the probability of this decay, corresponding to log ft > 8.8 within within a 95% confidence limit. This is the most stringent test of the Delta n = 0 selection rule to date. (C) 2019 The Authors. Published by Elsevier B.V.
Published: 2019

39. beta decays of the heaviest N = Z - l nuclei and proton instability of In-97

Author: Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I., de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y. -K., Kojouharov, I., Kubo, T., Kurz, N., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I., Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P. -A., Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I., de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y. -K., Kojouharov, I., Kubo, T., Kurz, N., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I., Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P. -A., Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: We report on new or more precise half-lives, beta-decay endpoint energies, and beta-delayed proton emission branching ratios of(91) Pd, Cd-95,In-97, and Sn-99. The measured values are consistent with known mirror transitions in lighter T-z = -1/2 nuclei, shell-model calculations, and various mass models. In addition to the beta -decaying (9/2(+)) ground state, circumstantial evidence for a short-lived, proton-emitting isomer with spin (1 /2(-)) was found in(97)In. Based on the experimental data, a semiempirical theory on proton emission, and shell-model calculations, the proton separation energy of the In-97 ground state was determined to be -0.10 +/- 0.19 MeV. The existence of the short-lived, proton-unstable (1 /2(-)) isomer in In-97 establishes Cd-9S as an rp-process waiting point.
Published: 2018

40. Spins and electromagnetic moments of( 101-109)cd

Author: Yordanov, D. T., Balabanski, D. L., Bissell, M. L., Blaum, K., Blazhev, A., Budincevic, I, Froemmgen, N., Geppert, Ch, Grawe, H., Hammen, M., Kreim, K., Neugart, R., Neyens, G., Noertershaeuser, W., Yordanov, D. T., Balabanski, D. L., Bissell, M. L., Blaum, K., Blazhev, A., Budincevic, I, Froemmgen, N., Geppert, Ch, Grawe, H., Hammen, M., Kreim, K., Neugart, R., Neyens, G., and Noertershaeuser, W.
Abstract: The neutron-deficient cadmium isotopes have been measured by high-resolution laser spectroscopy at CERN-ISOLDE. The electromagnetic moments of Cd-101 have been determined for the first time and the quadrupole-moment precision of Cd-103 has been vastly improved. The results on the sequence of 5/2(+) ground states in Cd101-109 are tentatively discussed in the context of simple structure in complex nuclei as similarities are found with the 11/2(-) states in the neutron-rich cases. Comparison with shell-model calculations reveals a prominent role of the two holes in the Z = 50 core.
Published: 2018

41. beta decays of the heaviest N = Z - l nuclei and proton instability of In-97

Author: Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I., de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y. -K., Kojouharov, I., Kubo, T., Kurz, N., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I., Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P. -A., Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., Park, J., Krucken, R., Lubos, D., Gernhaeuser, R., Lewitowicz, M., Nishimura, S., Ahn, D. S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I., de France, G., Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Gorska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, A., Kameda, D., Kim, G. D., Kim, Y. -K., Kojouharov, I., Kubo, T., Kurz, N., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I., Patel, Z., Rajabali, M. M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Soderstrom, P. -A., Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: We report on new or more precise half-lives, beta-decay endpoint energies, and beta-delayed proton emission branching ratios of(91) Pd, Cd-95,In-97, and Sn-99. The measured values are consistent with known mirror transitions in lighter T-z = -1/2 nuclei, shell-model calculations, and various mass models. In addition to the beta -decaying (9/2(+)) ground state, circumstantial evidence for a short-lived, proton-emitting isomer with spin (1 /2(-)) was found in(97)In. Based on the experimental data, a semiempirical theory on proton emission, and shell-model calculations, the proton separation energy of the In-97 ground state was determined to be -0.10 +/- 0.19 MeV. The existence of the short-lived, proton-unstable (1 /2(-)) isomer in In-97 establishes Cd-9S as an rp-process waiting point.
Published: 2018

42. Spins and electromagnetic moments of( 101-109)cd

Author: Yordanov, D. T., Balabanski, D. L., Bissell, M. L., Blaum, K., Blazhev, A., Budincevic, I, Froemmgen, N., Geppert, Ch, Grawe, H., Hammen, M., Kreim, K., Neugart, R., Neyens, G., Noertershaeuser, W., Yordanov, D. T., Balabanski, D. L., Bissell, M. L., Blaum, K., Blazhev, A., Budincevic, I, Froemmgen, N., Geppert, Ch, Grawe, H., Hammen, M., Kreim, K., Neugart, R., Neyens, G., and Noertershaeuser, W.
Abstract: The neutron-deficient cadmium isotopes have been measured by high-resolution laser spectroscopy at CERN-ISOLDE. The electromagnetic moments of Cd-101 have been determined for the first time and the quadrupole-moment precision of Cd-103 has been vastly improved. The results on the sequence of 5/2(+) ground states in Cd101-109 are tentatively discussed in the context of simple structure in complex nuclei as similarities are found with the 11/2(-) states in the neutron-rich cases. Comparison with shell-model calculations reveals a prominent role of the two holes in the Z = 50 core.
Published: 2018

43. Beta decay of 57Zn

Author: Jokinen, A., Nieminen, A., Äystö, J., Borcea, R., Caurier, E., Dendooven, P., Gierlik, M., Górska, M., Grawe, H., Hellström, M., Karny, M., Janas, Z., Kirchner, R., La Commara, M., Martinez-Pinedo, G., Mayet, P., Penttilä, H., Plochocki, A., Rejmund, M., Roeckl, E., Sawicka, M., Schlegel, C., Schmidt, K., Schwengner, R., Jokinen, A., Nieminen, A., Äystö, J., Borcea, R., Caurier, E., Dendooven, P., Gierlik, M., Górska, M., Grawe, H., Hellström, M., Karny, M., Janas, Z., Kirchner, R., La Commara, M., Martinez-Pinedo, G., Mayet, P., Penttilä, H., Plochocki, A., Rejmund, M., Roeckl, E., Sawicka, M., Schlegel, C., Schmidt, K., and Schwengner, R.
Published: 2018

44. Beta decays of the heaviest N = Z - l nuclei and proton instability of In-97.

Author: German Research Foundation, Federal Ministry of Education and Research (Germany), Ministerio de Economía y Competitividad (España), Natural Sciences and Engineering Research Council of Canada, French-Japanese International Associated Laboratory for Nuclear Structure Problems, National Research Foundation of Korea, Ministry of Education, Science and Technology (South Korea), University of Tokyo, RIKEN Nishina Center for Accelerator-Based Science, Japan Society for the Promotion of Science, Park, J., Krücken, R., Lubos, D., Gernhäuser, R., Lewitowicz, M., Nishimura, S., Ahn, D.S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I., France, G. de, Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Górska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, Andrea, Kameda, D., Kim, G. D., Kim, Y. K., Kojouharov, I., Kubo, T., Kurz, N., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I., Patel, Z., Rajabali, M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Söderström, P.-A., Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., Xu, Z. Y., German Research Foundation, Federal Ministry of Education and Research (Germany), Ministerio de Economía y Competitividad (España), Natural Sciences and Engineering Research Council of Canada, French-Japanese International Associated Laboratory for Nuclear Structure Problems, National Research Foundation of Korea, Ministry of Education, Science and Technology (South Korea), University of Tokyo, RIKEN Nishina Center for Accelerator-Based Science, Japan Society for the Promotion of Science, Park, J., Krücken, R., Lubos, D., Gernhäuser, R., Lewitowicz, M., Nishimura, S., Ahn, D.S., Baba, H., Blank, B., Blazhev, A., Boutachkov, P., Browne, F., Celikovic, I., France, G. de, Doornenbal, P., Faestermann, T., Fang, Y., Fukuda, N., Giovinazzo, J., Goel, N., Górska, M., Grawe, H., Ilieva, S., Inabe, N., Isobe, T., Jungclaus, Andrea, Kameda, D., Kim, G. D., Kim, Y. K., Kojouharov, I., Kubo, T., Kurz, N., Lorusso, G., Moschner, K., Murai, D., Nishizuka, I., Patel, Z., Rajabali, M., Rice, S., Sakurai, H., Schaffner, H., Shimizu, Y., Sinclair, L., Söderström, P.-A., Steiger, K., Sumikama, T., Suzuki, H., Takeda, H., Wang, Z., Watanabe, H., Wu, J., and Xu, Z. Y.
Abstract: We report on new or more precise half-lives, beta-decay endpoint energies, and beta-delayed proton emission branching ratios of(91) Pd, Cd-95,In-97, and Sn-99. The measured values are consistent with known mirror transitions in lighter T-z = -1/2 nuclei, shell-model calculations, and various mass models. In addition to the beta -decaying (9/2(+)) ground state, circumstantial evidence for a short-lived, proton-emitting isomer with spin (1 /2(-)) was found in(97)In. Based on the experimental data, a semiempirical theory on proton emission, and shell-model calculations, the proton separation energy of the In-97 ground state was determined to be -0.10 +/- 0.19 MeV. The existence of the short-lived, proton-unstable (1 /2(-)) isomer in In-97 establishes Cd-9S as an rp-process waiting point.
Published: 2018

45. Ultrafast-timing lifetime measurements in Ru-94 and Pd-96 : Breakdown of the seniority scheme in N=50 isotones

Author: Mach, H., Korgul, A., Gorska, M., Grawe, H., Matea, I., Stanoiu, M., Fraile, L. M., Penionzkevich, Yu. E., Santos, F. De Oliviera, Verney, D., Lukyanov, S., Cederwall, B, Covello, A., Dlouhy, Z., Fogelberg, B., De France, G., Gargano, A., Georgiev, G., Grzywacz, R., Lisetskiy, A. F., Mrazek, J., Nowacki, F., Plociennik, W. A., Podolyak, Zs., Ray, S., Ruchowska, E., Saint-Laurent, M. -G, Sawicka, M., Stodel, Ch., Tarasov, O., Mach, H., Korgul, A., Gorska, M., Grawe, H., Matea, I., Stanoiu, M., Fraile, L. M., Penionzkevich, Yu. E., Santos, F. De Oliviera, Verney, D., Lukyanov, S., Cederwall, B, Covello, A., Dlouhy, Z., Fogelberg, B., De France, G., Gargano, A., Georgiev, G., Grzywacz, R., Lisetskiy, A. F., Mrazek, J., Nowacki, F., Plociennik, W. A., Podolyak, Zs., Ray, S., Ruchowska, E., Saint-Laurent, M. -G, Sawicka, M., Stodel, Ch., and Tarasov, O.
Abstract: The advanced time-delayed gamma gamma(t) method has been applied to determine half-lives of low-lying states in the N = 50 isotones Ru-94 and Pd-96. The inferred experimental E2 strengths for the 4(+) -> 2(+) transitions in the two nuclei show a dramatic deviation with respect to the shell model predictions in the (f(5/2), p, g(9/2)) proton hole space in Sn-100. The anomalous behavior can be ascribed to a breakdown of the seniority quantum number in the pi g(9/2)(n) configuration due to particle-hole excitations across the N = Z = 50 shell as confirmed by large-scale shell model calculations., QC 20170222
Published: 2017
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46. The role of core excitations in the structure and decay of the 16(+) spin-gap isomer in Cd-96

Author: Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Bäck, Torbjörn, Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., Zhu, Y., Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Bäck, Torbjörn, Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., and Zhu, Y.
Abstract: The first evidence for beta-delayed proton emission from the 16(+) spin gap isomer in Cd-96 is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. beta p branching ratios for the ground state and 16(+) isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of Cd-95. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for l = 0, 2, 4 proton emission from three resonance-like states in Ag-96, that are populated by the beta decay of the isomer, and the results compared to the new data. The calculations suggest that l = 2 proton emission from the resonance states, which reside similar to 5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16(+) state., QC 20170522
Published: 2017
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47. Ultrafast-timing lifetime measurements in Ru-94 and Pd-96 : Breakdown of the seniority scheme in N=50 isotones

Author: Mach, Henryk, Korgul, A., Gorska, M., Grawe, H., Matea, I., Stanoiu, M., Fraile, L. M., Penionzkevich, Yu. E., Santos, F. De Oliviera, Verney, D., Lukyanov, S., Cederwall, B., Covello, A., Dlouhy, Z., Fogelberg, Birger, De France, G., Gargano, A., Georgiev, G., Grzywacz, R., Lisetskiy, A. F., Mrazek, J., Nowacki, F., Plociennik, W. A., Podolyak, Zs., Ray, S., Ruchowska, E., Saint-Laurent, M. -G, Sawicka, M., Stodel, Ch., Tarasov, O., Mach, Henryk, Korgul, A., Gorska, M., Grawe, H., Matea, I., Stanoiu, M., Fraile, L. M., Penionzkevich, Yu. E., Santos, F. De Oliviera, Verney, D., Lukyanov, S., Cederwall, B., Covello, A., Dlouhy, Z., Fogelberg, Birger, De France, G., Gargano, A., Georgiev, G., Grzywacz, R., Lisetskiy, A. F., Mrazek, J., Nowacki, F., Plociennik, W. A., Podolyak, Zs., Ray, S., Ruchowska, E., Saint-Laurent, M. -G, Sawicka, M., Stodel, Ch., and Tarasov, O.
Abstract: The advanced time-delayed gamma gamma(t) method has been applied to determine half-lives of low-lying states in the N = 50 isotones Ru-94 and Pd-96. The inferred experimental E2 strengths for the 4(+) -> 2(+) transitions in the two nuclei show a dramatic deviation with respect to the shell model predictions in the (f(5/2), p, g(9/2)) proton hole space in Sn-100. The anomalous behavior can be ascribed to a breakdown of the seniority quantum number in the pi g(9/2)(n) configuration due to particle-hole excitations across the N = Z = 50 shell as confirmed by large-scale shell model calculations.
Published: 2017
Full Text: View/download PDF

48. The role of core excitations in the structure and decay of the 16(+) spin-gap isomer in Cd-96

Author: Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., Zhu, Y., Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., and Zhu, Y.
Abstract: The first evidence for beta-delayed proton emission from the 16(+) spin gap isomer in Cd-96 is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. beta p branching ratios for the ground state and 16(+) isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of Cd-95. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for l = 0, 2, 4 proton emission from three resonance-like states in Ag-96, that are populated by the beta decay of the isomer, and the results compared to the new data. The calculations suggest that l = 2 proton emission from the resonance states, which reside similar to 5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16(+) state.
Published: 2017
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49. The role of core excitations in the structure and decay of the 16(+) spin-gap isomer in Cd-96

Author: Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., Zhu, Y., Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., and Zhu, Y.
Abstract: The first evidence for beta-delayed proton emission from the 16(+) spin gap isomer in Cd-96 is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. beta p branching ratios for the ground state and 16(+) isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of Cd-95. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for l = 0, 2, 4 proton emission from three resonance-like states in Ag-96, that are populated by the beta decay of the isomer, and the results compared to the new data. The calculations suggest that l = 2 proton emission from the resonance states, which reside similar to 5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16(+) state.
Published: 2017
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50. The role of core excitations in the structure and decay of the 16(+) spin-gap isomer in Cd-96

Author: Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., Zhu, Y., Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Back, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, Aila, Gerl, J., Gernhaeeuserk, R., Go, S., Gorska, M., Gregor, E., Isobe, T., Jenkins, D. G., Hotaka, H., Jolie, J., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Maier, L., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Nowacki, F., Pietralla, N., Schaffne, H., Soderstrom, P-A, Jung, H. S., Steiger, K., Sumikama, T., Taprogge, J., Thoele, P., Warr, N., Watanabe, H., Werner, V., Xu, Z. Y., Yoshinaga, K., and Zhu, Y.
Abstract: The first evidence for beta-delayed proton emission from the 16(+) spin gap isomer in Cd-96 is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. beta p branching ratios for the ground state and 16(+) isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of Cd-95. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for l = 0, 2, 4 proton emission from three resonance-like states in Ag-96, that are populated by the beta decay of the isomer, and the results compared to the new data. The calculations suggest that l = 2 proton emission from the resonance states, which reside similar to 5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16(+) state.
Published: 2017
Full Text: View/download PDF

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