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1,818 results on '"Köster, U."'

203. Medium-spin states of the neutron-rich nucleus Br87

Author

Nyakó, B. M., primary, Timár, J., additional, Csatlós, M., additional, Dombrádi, Zs., additional, Krasznahorkay, A., additional, Kuti, I., additional, Sohler, D., additional, Tornyi, T. G., additional, Czerwiński, M., additional, Rząca-Urban, T., additional, Urban, W., additional, Bączyk, P., additional, Atanasova, L., additional, Balabanski, D. L., additional, Sieja, K., additional, Blanc, A., additional, Jentschel, M., additional, Köster, U., additional, Mutti, P., additional, Soldner, T., additional, de France, G., additional, Simpson, G. S., additional, and Ur, C. A., additional

Published
2021
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204. Low-spin particle-core and hole-core excitations in Ca41,47,49 isotopes studied by cold-neutron-capture reactions

Author

Bottoni, S., primary, Cieplicka-Oryńczak, N., additional, Leoni, S., additional, Fornal, B., additional, Colò, G., additional, Bortignon, P. F., additional, Bocchi, G., additional, Bazzacco, D., additional, Benzoni, G., additional, Blanc, A., additional, Bracco, A., additional, Ceruti, S., additional, Crespi, F. C. L., additional, de France, G., additional, Gamba, E. R., additional, Iskra, Ł. W., additional, Jentschel, M., additional, Köster, U., additional, Michelagnoli, C., additional, Million, B., additional, Mengoni, D., additional, Mutti, P., additional, Niu, Y., additional, Porzio, C., additional, Simpson, G., additional, Soldner, T., additional, Szpak, B., additional, Türler, A., additional, Ur, C. A., additional, and Urban, W., additional

Published
2021
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206. The decay of the new neutron-rich isotope 217Bi

Author

Kurpeta, J., P\lochocki, A., Andreyev, A. N., Äystö, J., De Smet, A., De Witte, H., Evensen, A.-H., Fedoseyev, V., Franchoo, S., Górska, M., Huhta, M., Huyse, M., Janas, Z., Jokinen, A., Karny, M., Kugler, E., Kurcewicz, W., Köster, U., Lettry, J., Nieminen, A., Partes, K., Ramdhane, M., Ravn, H. L., Rykaczewski, K., Szerypo, J., Van de Vel, K., Van Duppen, P., Weissman, L., Walter, G., Wöhr, A., Collaboration, IS387, and Collaboration, ISOLDE

Published
2003
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207. Isomeric and ground-state decay of 215 Bi

Author

Kurpeta, J., Plochocki, A., Andreyev, A. N., Äystö, J., De Smet, A., Witte, H. De, Evensen, A.-H., Fedoseyev, V., Franchoo, S., Górska, M., Grawe, H., Huhta, M., Huyse, M., Janas, Z., Jokinen, A., Karny, M., Kugler, E., Kurcewicz, W., Köster, U., Lettry, J., Nieminen, A., Partes, K., Ramdhane, M., Ravn, H. L., Rykaczewski, K., Szerypo, J., Van de Vel, K., Van Duppen, P., Weissman, L., Walter, G., Wöhr, A., IS387 Collaboration, and ISOLDE Collaboration

Published
2003
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208. Measurement of the production cross-sections of neutron-rich Kr and Xe isotopes

Author

ISOLDE collaboration, Catherall, R., Cederkall, J., Elder, K., Fedosseev, V. N., Fynbo, H., Georg, U., Giles, T. J., Hagebo, E., Joinet, A., Jonsson, O. C., Koester, U., Lau, C., Lettry, J., Nilsson, T., Ravn, H. L., Santana-Leitner, M., Weissman, L., Äystö, Juha, editor, Dendooven, Peter, editor, Jokinen, Ari, editor, and Leino, Matti, editor

Published
2003
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209. Photofission for the production of radioactive beams: Experimental data from an on-line measurement

Author

Ibrahim, F., Obert, J., Bajeat, O., Buhour, J.M., Carminati, D., Clapier, F., Donzaud, C., Ducourtieux, M., Dufour, J.M., Essabaa, S., Galès, S., Guillemaud-Mueller, D., Hosni, F., Hubert, O., Joinet, A., Köster, U., Lau, C., Lefort, H., Le Scornet, G., Lettry, J., Mueller, A.C., Mirea, M., Pauwels, N., Perru, O., Potier, J.C., Proust, J., Pougheon, F., Ravn, H., Rinolfi, L., Rossat, G., Safa, H., Saint Laurent, M.G., Santana-Leitner, M., Sorlin, O., and Verney, D.

Published
2002
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214. Ground-state spin of 59Mn

Author

Oinonen, M., Köster, U., Äystö, J., Fedoseyev, V., Mishin, V., Huikari, J., Jokinen, A., Nieminen, A., Peräjärvi, K., Knipper, A., Walter, G., and the ISOLDE Collaboration

Published
2001
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215. Yields of neutron-rich rubidium and cesium isotopes from fast-neutron induced fission of 238U, obtained by studying their release from a thick ISOL target

Author

Hosni, F., Lau, C., Bajeat, O., Borcea, R., Bourgeois, Ch., Donzaud, C., Ducourtieux, M., Essabaa, S., Guillemaud-Mueller, D., Ibrahim, F., Lefort, H., Mueller, A.C., Perru, O., Roussière, B., Sauvage, J., Kratz, K.L., Pfeiffer, B., Köster, U., Joinet, A., Lettry, J., Peräjärvi, K., Tecchio, L., Lhersonneau, G., Fioretto, E., Prete, G., and Stroe, L.

Published
2006
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217. The Generalized Centroid Difference method for lifetime measurements via γ-γ coincidences using large fast-timing arrays

Author

Régis J.-M., Jolie J., Mach H., Simpson G.S., Blazhev A., Pascovici G., Pfeiffer M., Rudigier M., Saed-Samii N., Warr N., Blanc A., de France G., Jentschel M., Köster U., Mutti P., Soldner T., Ur C.A., Urban W., Bruce A.M., Drouet F., Fraile L.M., Ilieva S., Korten W., Kröll T., Lalkovski S., Mărginean S., Paziy V., Podolyák Zs., Regan P.H., Stezowski O., and Vancraeyenest A.

Subjects
Physics, QC1-999
Abstract

A novel method for direct electronic “fast-timing” lifetime measurements of nuclear excited states via γ-γ coincidences using an array equipped with N very fast high-resolution LaBr3(Ce) scintillator detectors is presented. The generalized centroid difference method provides two independent “start” and “stop” time spectra obtained without any correction by a superposition of the N(N – 1)/2 calibrated γ-γ time difference spectra of the N detector fast-timing system. The two fast-timing array time spectra correspond to a forward and reverse gating of a specific γ-γ cascade and the centroid difference as the time shift between the centroids of the two time spectra provides a picosecond-sensitive mirror-symmetric observable of the set-up. The energydependent mean prompt response difference between the start and stop events is calibrated and used as a single correction for lifetime determination. These combined fast-timing array mean γ-γ zero-time responses can be determined for 40 keV < Eγ < 1.4 MeV with a precision better than 10 ps using a 152Eu γ-ray source. The new method is described with examples of (n,γ) and (n,f,γ) experiments performed at the intense cold-neutron beam facility PF1B of the Institut Laue-Langevin in Grenoble, France, using 16 LaBr3(Ce) detectors within the EXILL&FATIMA campaign in 2013. The results are discussed with respect to possible systematic errors induced by background contributions.

Published
2015
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218. Fission studies by prompt gamma-ray spectrometry

Author

Materna T., Letourneau A., Amouroux Ch., Marchix A., Litaize O., Sérot O., Regnier D., Blanc A., Jentschel M., Köster U., Mutti P., Soldner T., Simpson G., Leoni S., de France G., and Urban W.

Subjects
Physics, QC1-999
Abstract

The feasibility of retrieving accurate fission observables with a Ge-detector array around a fissile target placed in a cold neutron beam was tested. In three measurement campaigns performed at ILL with the EXILL setup, 235U and 241Pu targets were placed in the high flux cold neutron beam available at the PF1B neutron guide. Gamma-rays following fission were detected by an array of 16 Ge detectors. In the following study, part of data was analyzed as a proof of principle. A set of yields belonging to the Kr-Ba pair were extracted using a gamma-gamma coincidence technique. Preliminary results were compared to the predictions of two phenomenological models: GEF and FIFRELIN.

Published
2015
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219. The (n,γ) campaigns at EXILL

Author

Jolie J., Régis J.-M., Wilmsen D., Ahmed S., Pfeiffer M., Saed-Samii N., Warr N., Blanc A., Jentschel M., Köster U., Mutti P., Soldner T., Simpson G., De France G., Urban W., Drouet F., Vancraeyenest A., Baczyk P., Czerwinski M., Korgul A., Mazzocchi C., Rzaca-Urban T., Bruce A., Roberts O.J., Fraile L.M., Mach H., Paziy V., Ignatov A., Ilieva S., Kröll Th., Scheck M., Thürauf M., Ivanova D., Kisyov S., Lalkovski S., Podolyák Zs., Regan P.H., Korten W., Zielinska M., Salsac M.D., Habs D., Thirolf P.G., Ur C. A., Bernards C., Casten R.F., Cooper N., Werner V., Cakirli R.B., Leoni S., Benzoni G., Bocchi G., Bottoni S., Crespi F.C.L., Fornal B., Cieplicka N., Szpak B., Petrache C.M., Leguillon R., John R., Lorenz C., Massarczyk R., Schwengner R., Curien D., Lozeva R., Sengele L., Marginean N., and Lica R.

Subjects
Physics, QC1-999
Abstract

At the PF1B cold neutron beam line at the Institut Laue Langevin, the EXILL array consisting of EXOGAM, GASP and ILL-Clover detectors was used to perform (n,γ) measurements at very high coincidence rates. About ten different reactions were measured in autumn 2012 using a highly collimated cold neutron beam. In spring 2013, the EXOGAM array was combined with 16 LaBr3(Ce) scintillators in the EXILL&FATIMA campaign for the measurement of lifetimes using the generalised centroid difference method. We report on the properties of the set-ups and present first results from both campaigns.

Published
2015
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220. High precision γ spectroscopy of 69,71Zn from (n, γ) reactions using EXILL

Author

Bączyk P., Czerwiński M., Korgul A., Rząca-Urban T., Urban W., Blanc A., Jentschel M., Mutti P., Köster U., Soldner T., de France G., Simpson G., and Ur C.A.

Subjects
Physics, QC1-999
Abstract

Measurement of γ radiation following slow neutron capture on 68Zn and 70Zn using very efficient germanium array EXILL was done at Institute Laue-Langevin in Grenoble. New spectroscopic information for 69Zn (including doorway state) and first results for 71Zn (accurate energy of β decaying isomer) were obtained. Binding energies for 68Zn, 69Zn and 71Zn were determined with 5-to-70 times higher accuracy than presented in the literature.

Published
2015
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221. Neutron-capture experiment on 77Se with EXILL at ILL Grenoble

Author

Lorenz Ch., John R., Massarczyk R., Schwengner R., Blanc A., de France G., Jentschel M., Köster U., Mutti P., Simpson G., Soldner T., Urban W., Valenta S., and Belgya T.

Subjects
Physics, QC1-999
Abstract

The neutron capture reaction at 77Se has been studied with cold neutrons in the course of the EXILL campaign at the high-flux reactor of the Institut Laue-Langevin Grenoble. A simulation of the detector array with Geant4 has been accomplished and evaluated. The detector response has been deduced and measured spectra were unfolded, which have been compared with simulations using γDex to determine strength functions.

Published
2015
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222. From EXILL (EXogam at the ILL) to FIPPS (FIssion Product Prompt γ-ray Spectrometer)

Author

Blanc A., Chebboubi A., de France G., Drouet F., Faust H., Jentschel M., Kessedjian G., Köster U., Leoni S., Materna T., Mutti P., Panebianco S., Sage C., Simpson G., Soldner T., Ur C. A., Urban W., and Vancraeyenest A.

Subjects
Physics, QC1-999
Abstract

Within the EXILL campaign a large and efficient cluster of Ge-detectors was installed around a very well collimated neutron beam. This has allowed to carry out rather complete spectroscopic studies close to the line of stability using the (n,γ) reaction. Neutron rich isotopes were produced by neutron induced fission and prompt spectroscopy was carried out. The isotope selection in this setup was based on a partially known level scheme and the use of triple coincidences. The latter is limiting the statistical sensitivity in the case of weak production yields. Based on the experiences of these campaigns we are currently developing a new setup: FIPPS (FIssion Product Prompt Spectroscopy). This setup combines a collimated neutron beam, a highly efficient cluster of Ge detectors, a gas filled magnet and auxiliary detectors. The presence of the gas filled magnet will allow us to identify fission products directly and should give access to a new quality of studies if compared to the EXILL campaign. The EXILL campaign and the FIPPS project are presented.

Published
2015
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225. Laser ionization in β decay studies of Zn and Mn nuclei

Author

Oinonen, M., Jading, Y., Köster, U., Lettry, J., Ravn, H., Äystö, J., Dendooven, P., Huikari, J., Jokinen, A., Lipas, P.O., Nieminen, A., Peräjärvi, K., Siiskonen, T., Baumann, P., Huck, A., Knipper, A., Ramdhane, M., Walter, G., Didierjean, F., Fedoseyev, V.N., Mishin, V.I., Koizumi, M., Liu, W., Roeckl, E., and Sebastian, V.

Published
2000
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231. Detailed low-spin spectroscopy of Ni65 via neutron capture reaction

Author

Porzio, C., primary, Michelagnoli, C., additional, Cieplicka-Oryńczak, N., additional, Sferrazza, M., additional, Leoni, S., additional, Fornal, B., additional, Tsunoda, Y., additional, Otsuka, T., additional, Bottoni, S., additional, Costache, C., additional, Crespi, F. C. L., additional, Iskra, Ł. W., additional, Jentschel, M., additional, Kandzia, F., additional, Kim, Y.-H., additional, Köster, U., additional, Mărginean, N., additional, Mihai, C., additional, Mutti, P., additional, and Turturică, A., additional

Published
2020
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232. γ spectroscopy of the Y96 isotope: Searching for the onset of shape coexistence before N=60

Author

Iskra, Ł. W., primary, Leoni, S., additional, Fornal, B., additional, Michelagnoli, C., additional, Kandzia, F., additional, Mărginean, N., additional, Barani, M., additional, Bottoni, S., additional, Cieplicka-Oryńczak, N., additional, Colombi, G., additional, Costache, C., additional, Crespi, F. C. L., additional, Dudouet, J., additional, Jentschel, M., additional, Kim, Y. H., additional, Köster, U., additional, Lica, R., additional, Mărginean, R., additional, Mihai, C., additional, Mihai, R. E., additional, Nita, C. R., additional, Pascu, S., additional, Porzio, C., additional, Reygadas, D., additional, Ruiz-Martinez, E., additional, and Turturica, A., additional

Published
2020
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233. Lifetime measurements in the odd−A nucleus Hf177

Author

Knafla, L., primary, Alexa, P., additional, Köster, U., additional, Thiamova, G., additional, Régis, J.-M., additional, Jolie, J., additional, Blanc, A., additional, Bruce, A. M., additional, Esmaylzadeh, A., additional, Fraile, L. M., additional, de France, G., additional, Häfner, G., additional, Ilieva, S., additional, Jentschel, M., additional, Karayonchev, V., additional, Korten, W., additional, Kröll, T., additional, Lalkovski, S., additional, Leoni, S., additional, Mach, H., additional, Mărginean, N., additional, Mutti, P., additional, Pascovici, G., additional, Paziy, V., additional, Podolyák, Zs., additional, Regan, P. H., additional, Roberts, O. J., additional, Saed-Samii, N., additional, Simpson, G. S., additional, Smith, J. F., additional, Soldner, T., additional, Townsley, C., additional, Ur, C. A., additional, Urban, W., additional, Vancraeyenest, A., additional, and Warr, N., additional

Published
2020
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235. Fast-timing study of Ga81 from the β decay of Zn81

Author

Paziy, V., primary, Fraile, L. M., additional, Mach, H., additional, Olaizola, B., additional, Simpson, G. S., additional, Aprahamian, A., additional, Bernards, C., additional, Briz, J. A., additional, Bucher, B., additional, Chiara, C. J., additional, Dlouhý, Z., additional, Gheorghe, I., additional, Ghiţǎ, D., additional, Hoff, P., additional, Jolie, J., additional, Köster, U., additional, Kurcewicz, W., additional, Licǎ, R., additional, Mǎrginean, N., additional, Mǎrginean, R., additional, Régis, J.-M., additional, Rudigier, M., additional, Sava, T., additional, Stǎnoiu, M., additional, Stroe, L., additional, and Walters, W. B., additional

Published
2020
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236. Erratum: β -delayed fission of Tl180 [Phys. Rev. C 88 , 044321 (2013)]

Author

Elseviers, J., primary, Andreyev, A. N., additional, Huyse, M., additional, Van Duppen, P., additional, Antalic, S., additional, Barzakh, A., additional, Bree, N., additional, Cocolios, T. E., additional, Comas, V. F., additional, Diriken, J., additional, Fedorov, D., additional, Fedosseev, V. N., additional, Franchoo, S., additional, Ghys, L., additional, Heredia, J. A., additional, Ivanov, O., additional, Köster, U., additional, Marsh, B. A., additional, Nishio, K., additional, Page, R. D., additional, Patronis, N., additional, Seliverstov, M. D., additional, Tsekhanovich, I., additional, Van den Bergh, P., additional, Van De Walle, J., additional, Venhart, M., additional, Vermote, S., additional, Veselský, M., additional, and Wagemans, C., additional

Published
2020
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237. Neutron flux and spectrum in the Dresden Felsenkeller underground facility studied by moderated He3 counters

Author

Grieger, M., primary, Hensel, T., additional, Agramunt, J., additional, Bemmerer, D., additional, Degering, D., additional, Dillmann, I., additional, Fraile, L. M., additional, Jordan, D., additional, Köster, U., additional, Marta, M., additional, Müller, S. E., additional, Szücs, T., additional, Taín, J. L., additional, and Zuber, K., additional

Published
2020
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240. 7Be (n ,p ) 7Li Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN

Author

n_TOF Collaboration, Damone, L., Barbagallo, M., Mastromarco, M., Mengoni, A., Cosentino, L., Maugeri, E., Heinitz, S., Schumann, D., Dressler, R., Käppeler, F., Colonna, N., Finocchiaro, P., Andrzejewski, J., Perkowski, J., Gawlik, A., Aberle, O., Altstadt, S., Ayranov, M., Audouin, L., Bacak, M., Balibrea-Correa, J., Ballof, J., Bécares, V., Bečvář, F., Beinrucker, C., Bellia, G., Bernardes, A. P., Berthoumieux, E., Billowes, J., Borge, M. J. G., Bosnar, D., Brown, A., Brugger, M., Busso, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Catherall, R., Cerutti, F., Chen, Y. H., Chiaveri, E., Correia, J. G. M., Cortés, G., Cortés-Giraldo, M. A., Cristallo, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dorsival, A., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., García-Rios, A., Gilardoni, S., Glodariu, T., Göbel, K., Gonçalves, I. F., González-Romero, E., Goodacre, T. D., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Johnston, K., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Kimura, A., Kivel, N., Köster, U., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Marsh, B., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Matteucci, F., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Piersanti, L., Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rothe, S., Rout, P., Rubbia, C., Ryan, J., Sabaté-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Seiffert, C., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Stora, T., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiß, C., Wolf, C., Woods, P. J., Wright, T., Žugec, P., Damone, L., Barbagallo, M., Mastromarco, M., Mengoni, A., Cosentino, L., Maugeri, E., Heinitz, S., Schumann, D., Dressler, R., Käppeler, F., Colonna, N., Finocchiaro, P., Andrzejewski, J., Perkowski, J., Gawlik, A., Aberle, O., Altstadt, S., Ayranov, M., Audouin, L., Bacak, M., Balibrea-Correa, J., Ballof, J., Bécares, V., Bečvář, F., Beinrucker, C., Bellia, G., Bernardes, A. P., Berthoumieux, E., Billowes, J., Borge, M. J. G., Bosnar, D., Brown, A., Brugger, M., Busso, MAURIZIO MARIA, Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Catherall, R., Cerutti, F., Chen, Y. H., Chiaveri, E., Correia, J. G. M., Cortés, G., Cortés-Giraldo, M. A., Cristallo, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dorsival, A., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., García-Rios, A., Gilardoni, S., Glodariu, T., Göbel, K., Gonçalves, I. F., González-Romero, E., Goodacre, T. D., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Johnston, K., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Kimura, A., Kivel, N., Köster, U., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Marsh, B., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Matteucci, F., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Piersanti, L., Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rothe, S., Rout, P., Rubbia, C., Ryan, J., Sabaté-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Schmidt, Siegrid, Sedyshev, P., Seiffert, C., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Stora, T., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, Annavera, Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiß, C., Wolf, C., Woods, P. J., Wright, T., Žugec, P., n TOF, Collaboration, ITA, GBR, FRA, DEU, ESP, AUS, HRV, JPN, GRC, POL, CZE, and ROU

Subjects
Physics, ddc:530, Nuclear Experiment, Nuclear Physics
Abstract

We report on the measurement of the $^{7}$Be(n, p)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n_TOF facility at CERN. This reaction plays a key role in the lithium yield of the big bang nucleosynthesis (BBN) for standard cosmology. The only two previous time-of-flight measurements performed on this reaction did not cover the energy window of interest for BBN, and they showed a large discrepancy between each other. The measurement was performed with a Si telescope and a high-purity sample produced by implantation of a 7Be ion beam at the ISOLDE facility at CERN. While a significantly higher cross section is found at low energy, relative to current evaluations, in the region of BBN interest, the present results are consistent with the values inferred from the time-reversal $^{7}$Li(p, n)$^{7}$Be reaction, thus yielding only a relatively minor improvement on the so-called cosmological lithium problem. The relevance of these results on the nearthreshold neutron production in the p + $^{7}$Li reaction is also discussed.

Published
2018

243. Coulomb excitation of neutron-rich 138,140,142Xe at REX-ISOLDE

Author

Kröll, Th., Behrens, T., Krücken, R., Bildstein, V., Gernhäuser, R., Maierbeck, P., Stefanescu, I., Ivanov, O., Van de Walle, J., Warr, N., Butler, P. A., Cederkäll, J., Delahaye, P., Fraile, L. M., Georgiev, G., Köster, U., Sieber, T., Voulot, D., Wenander, F., Kent, P. E., Ekström, A., Speidel, K.-H., Leske, J., Schielke, S., Habs, D., Lutter, R., Thirolf, P., Scheit, H., and Davinson, T.

Published
2007
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245. Properties of the 12C 10 MeV state determined through β-decay

Author

Diget, C.Aa., Barker, F.C., Borge, M.J.G., Cederkäll, J., Fedosseev, V.N., Fraile, L.M., Fulton, B.R., Fynbo, H.O.U., Jeppesen, H.B., Jonson, B., Köster, U., Meister, M., Nilsson, T., Nyman, G., Prezado, Y., Riisager, K., Rinta-Antila, S., Tengblad, O., Turrion, M., Wilhelmsen, K., and Äystö, J.

Published
2005
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246. The neutron-rich Mg isotopes: first results from MINIBALL at REX-ISOLDE

Author

Niedermaier, O., Scheit, H., Bildstein, V., Boie, H., Fitting, J., von Hahn, R., Köck, F., Lauer, M., Pal, U.K., Podlech, H., Repnow, R., Schwalm, D., Alvarez, C., Ames, F., Bollen, G., Emhofer, S., Habs, D., Kester, O., Lutter, R., Rudolph, K., Pasini, M., Thirolf, P.G., Wolf, B.H., Eberth, J., Gersch, G., Hess, H., Reiter, P., Thelen, O., Warr, N., Weisshaar, D., Aksouh, F., Van den Bergh, P., Van Duppen, P., Huyse, M., Ivanov, O., Mayet, P., Van de Walle, J., Äystö, J., Butler, P.A., Cederkäll, J., Delahaye, P., Fynbo, H.O.U., Fraile, L.M., Forstner, O., Franchoo, S., Köster, U., Nilsson, T., Oinonen, M., Sieber, T., Wenander, F., Pantea, M., Richter, A., Schrieder, G., Simon, H., Behrens, T., Gernhäuser, R., Kröll, T., Krücken, R., Münch, M., Davinson, T., Gerl, J., Huber, G., Hurst, A., Iwanicki, J., Jonson, B., Lieb, P., Liljeby, L., Schempp, A., Scherillo, A., Schmidt, P., and Walter, G.

Published
2005
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248. PET in vivo generators 134Ce and 140Nd on an internalizing monoclonal antibody probe.

Author

Severin, G. W., Fonslet, J., Kristensen, L. K., Nielsen, C. H., Jensen, A. I., Kjær, A., Mazar, A. P., Johnston, K., and Köster, U.

Subjects
MONOCLONAL antibody probes, PLASMINOGEN activators, POSITRON emission tomography, BIOCONJUGATES, NUCLIDES
Abstract

The in vivo-generator radionuclides 140Nd (t1/2 = 3.4 d) and 134Ce (t1/2 = 3.2 d) were used to trace a urokinase-type plasminogen activator (uPA)-targeting mouse monoclonal antibody, ATN-291, in U87 MG xenograft tumor-bearing mice. ATN-291 is known to internalize on the uPA/uPA-receptor pair, making it an appropriate targeting vector for investigating the fate of in vivo generator daughters on internalizing probes. Ante-mortem and post-mortem PET imaging at 120 h post-injection gave no indication of redistribution of the positron emitting daughter nuclides 134La and 140Pr from tumor tissue (p > 0.5). The lack of redistribution indicates that the parent radionuclides 134Ce and 140Nd could be considered as long-lived PET-diagnostic matches to therapeutic radionuclides like 177Lu, 161Tb and 225Ac when internalizing bioconjugates are employed. [ABSTRACT FROM AUTHOR]

Published
2022
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249. Lifetime measurements in neutron rich $^{129}$Sn and $^{130,132}$Te

Author

Kumar, D., Bhattacharjee, T., Gerhard, L., Knafla, L., Esmaylzadeh, A., Dunkel, F., Schomaker, K., Régis, J.-M., Alam, S.S., Basak, S., Banerjee, D., Kim, Y.H., Köster, U., Saha Sarkar, M., Institut Laue-Langevin (ILL), and ILL

Subjects
Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; Electromagnetic transition rates provide one of the most sensitive probes of nuclear structure and they are of great value in probing the details of nuclear many-body wave functions in spherical and transitional nuclei around the closed shells (“magic nuclei”) [1,2]. Such measurements in Sn and Te nuclei close to the double shell closure of 132Sn are of substantial importance

Published
2019

250. High-resolution and low-background $$^{163}$$ <math><msup><mrow></mrow><mn>163</mn></msup></math> Ho spectrum: interpretation of the resonance tails

Author

Velte, C., Ahrens, F., Barth, A., Blaum, K., Braß, M., Door, M., Dorrer, H., Düllmann, Ch., Eliseev, S., Enss, C., Filianin, P., Fleischmann, A., Gastaldo, L., Goeggelmann, A., Goodacre, T., Haverkort, M., Hengstler, D., Jochum, J., Johnston, K., Keller, M., Kempf, S., Kieck, T., König, C., Köster, U., Kromer, K., Mantegazzini, F., Marsh, B., Novikov, Yu., Piquemal, F., Riccio, C., Richter, D., Rischka, A., Rothe, S., Schüssler, R., Schweiger, Ch., Stora, T., Wegner, M., Wendt, K., Zampaolo, M., and Zuber, K.

Abstract

The determination of the effective electron neutrino mass via kinematic analysis of beta and electron capture spectra is considered to be model-independent since it relies on energy and momentum conservation. At the same time the precise description of the expected spectrum goes beyond the simple phase space term. In particular for electron capture processes, many-body electron-electron interactions lead to additional structures besides the main resonances in calorimetrically measured spectra. A precise description of the $$^{163}$$ 163 Ho spectrum is fundamental for understanding the impact of low intensity structures at the endpoint region where a finite neutrino mass affects the shape most strongly. We present a low-background and high-energy resolution measurement of the $$^{163}$$ 163 Ho spectrum obtained in the framework of the ECHo experiment. We study the line shape of the main resonances and multiplets with intensities spanning three orders of magnitude. We discuss the need to introduce an asymmetric line shape contribution due to Auger–Meitner decay of states above the auto-ionisation threshold. With this we determine an enhancement of count rate at the endpoint region of about a factor of 2, which in turn leads to an equal reduction in the required exposure of the experiment to achieve a given sensitivity on the effective electron neutrino mass.

Published
2019

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