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Your search keyword '"Neidherr, D."' showing total 237 results
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237 results on '"Neidherr, D."'

1. First glimpse of the $N=82$ shell closure below $Z=50$ from masses of neutron-rich cadmium isotopes and isomers

Author

Manea, V., Karthein, J., Atanasov, D., Bender, M., Blaum, K., Cocolios, T. E., Eliseev, S., Herlert, A., Holt, J. D., Huang, W. J., Litvinov, Yu. A., Lunney, D., Menéndez, J., Mougeot, M., Neidherr, D., Schweikhard, L., Schwenk, A., Simonis, J., Welker, A., Wienholtz, F., and Zuber, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

We probe the $N=82$ nuclear shell closure by mass measurements of neutron-rich cadmium isotopes with the ISOLTRAP spectrometer at ISOLDE-CERN. The new mass of $^{132}$Cd offers the first value of the $N=82$, two-neutron shell gap below $Z=50$ and confirms the phenomenon of mutually enhanced magicity at $^{132}$Sn. Using the recently implemented phase-imaging ion-cyclotron-resonance method, the ordering of the low-lying isomers in $^{129}$Cd and their energies are determined. The new experimental findings are used to test large-scale shell-model, mean-field and beyond-mean-field calculations, as well as the ab initio valence-space in-medium similarity renormalization group., Comment: 7 pages, 5 figures; reference added, minor editorial corrections

Published
2020
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2. Study of the long-lived excited state in the neutron deficient nuclides $^{195,197,199}$Po by precision mass measurement

Author

Althubiti, N. A., Atanasov, D., Blaum, K., Cocolios, T. E., Goodacre, T. Day, Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., George, S., Herfurth, F., Heyde, K., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Neidherr, D., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Welker, A., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment
Abstract

Direct mass measurements of the low-spin $3/2^{(-)}$ and high-spin $13/2^{(+)}$ states in the neutron-deficient isotopes $^{195}$Po, $^{197}$Po, and high-spin $13/2^{(+)}$ state in $^{199}$Po were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the $\nu$i$_{13/2}$ orbital in $^{195,197}$Po. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from $\alpha$-decay chains. The new excitation energies complete the knowledge of the energy systematics in the region and confirm for the first time that the $13/2^{(+)}$ states remain isomeric, independent of the number of valence neutrons.

Published
2017
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3. Producing gold at ISOLDE-CERN

Author

Barzakh, A.E., Andreyev, A.N., Atanasov, D., Cubiss, J.G., Harding, R.D., Al Monthery, M., Althubiti, N.A., Andel, B., Antalic, S., Ballof, J., Blaum, K., Cocolios, T.E., Van Duppen, P., Day Goodacre, T., de Roubin, A., Duchemin, C., Farooq-Smith, G.J., Fedorov, D.V., Fedosseev, V.N., Fink, D.A., Gaffney, L.P., Ghys, L., Huyse, M., Imai, N., Johnson, J., Kreim, S., Lunney, D., Lynch, K.M., Manea, V., Marsh, B.A., Martinez Palenzuela, Y., Molkanov, P.L., Neidherr, D., Panteleev, V.N., Rosenbusch, M., Rossel, R.E., Rothe, S., Schweikhard, L., Seliverstov, M.D., Sels, S., Van Beveren, C., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R.N., and Zuber, K.

Published
2022
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4. High-Energy Laser Facility PHELIX at GSI: Latest Advances and Extended Capabilities

Author

Major, Zs., primary, Eisenbarth, U., additional, Zielbauer, B., additional, Brabetz, C., additional, Ohland, J. B., additional, Zobus, Y., additional, Roeder, S., additional, Reemts, D., additional, Kunzer, S., additional, Götte, S., additional, Neidherr, D., additional, Hornung, J., additional, Kewes, P., additional, Schumacher, D., additional, Beck, D., additional, Hesselbach, P., additional, Malki, M., additional, Neumayer, P., additional, Weyrich, K., additional, Tauschwitz, A., additional, and Bagnoud, V., additional

Published
2024
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5. Precision Mass Measurements of 129-131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

Author

Atanasov, D., Ascher, P., Blaum, K., Cakirli, R. B., Cocolios, T. E., George, S., Herfurth, F., Kisler, D., Kowalska, M., Kreim, S., Litvinov, Yu. A., Lunney, D., Manea, V., Neidherr, D., Rosenbusch, M., Schweikhard, L., Welker, A., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment
Abstract

Masses adjacent to the classical waiting-point nuclide 130Cd have been measured by using the Penning- trap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N = 82 shell gap below the doubly magic 132Sn. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A = 128 - 132 region and a reduction of the uncertainties from the precision mass input data.

Published
2015
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6. Probing the N = 32 shell closure below the magic proton number Z = 20: Mass measurements of the exotic isotopes 52,53K

Author

Rosenbusch, M., Ascher, P., Atanasov, D., Barbieri, C., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R. B., Cipollone, A., George, S., Herfurth, F., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Schweikhard, L., Somà, V., Stanja, J., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The recently confirmed neutron-shell closure at N = 32 has been investigated for the first time below the magic proton number Z = 20 with mass measurements of the exotic isotopes 52,53K, the latter being the shortest-lived nuclide investigated at the online mass spectrometer ISOLTRAP. The resulting two-neutron separation energies reveal a 3 MeV shell gap at N = 32, slightly lower than for 52Ca, highlighting the doubly-magic nature of this nuclide. Skyrme-Hartree-Fock-Boguliubov and ab initio Gorkov-Green function calculations are challenged by the new measurements but reproduce qualitatively the observed shell effect., Comment: 5 pages, 5 figures

Published
2015
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7. PUMA, antiProton unstable matter annihilation: PUMA collaboration

Author

Aumann, T., Bartmann, W., Boine-Frankenheim, O., Bouvard, A., Broche, A., Butin, F., Calvet, D., Carbonell, J., Chiggiato, P., De Gersem, H., De Oliveira, R., Dobers, T., Ehm, F., Somoza, J. Ferreira, Fischer, J., Fraser, M., Friedrich, E., Frotscher, A., Gomez-Ramos, M., Grenard, J.-L., Hobl, A., Hupin, G., Husson, A., Indelicato, P., Johnston, K., Klink, C., Kubota, Y., Lazauskas, R., Malbrunot-Ettenauer, S., Marsic, N., O Müller, W. F., Naimi, S., Nakatsuka, N., Necca, R., Neidherr, D., Neyens, G., Obertelli, A., Ono, Y., Pasinelli, S., Paul, N., Pollacco, E. C., Rossi, D., Scheit, H., Schlaich, M., Schmidt, A., Schweikhard, L., Seki, R., Sels, S., Siesling, E., Uesaka, T., Vilén, M., Wada, M., Wienholtz, F., Wycech, S., and Zacarias, S.

Published
2022
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8. Penning trap mass measurements on (99-109)$Cd with ISOLTRAP and implications on the rp process

Author

Breitenfeldt, M., Audi, G., Beck, D., Blaum, K., George, S., Herfurth, F., Herlert, A., Kellerbauer, A., Kluge, H. -J., Kowalska, M., Lunney, D., Naimi, S., Neidherr, D., Schatz, H., Schwarz, S., and Schweikhard, L.

Subjects
Nuclear Experiment
Abstract

Penning trap mass measurements on neutron-deficient Cd isotopes (99-109)Cd have been performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN, all with relative mass uncertainties below 3*10^8. A new mass evaluation has been performed. The mass of 99Cd has been determined for the first time which extends the region of accurately known mass values towards the doubly magic nucleus 100Sn. The implication of the results on the reaction path of the rp process in stellar X-ray bursts is discussed. In particular, the uncertainty of the abundance and the overproduction created by the rp-process for the mass A = 99 is demonstrated by reducing the uncertainty of the proton-separation energy of 100In Sp(100In) by a factor of 2.5., Comment: 14 pages, 9 figures

Published
2009
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9. Deformation versus Sphericity in the Ground States of the Lightest Gold Isotopes

Author

Cubiss, J. G., primary, Andreyev, A. N., additional, Barzakh, A. E., additional, Van Duppen, P., additional, Hilaire, S., additional, Péru, S., additional, Goriely, S., additional, Al Monthery, M., additional, Althubiti, N. A., additional, Andel, B., additional, Antalic, S., additional, Atanasov, D., additional, Blaum, K., additional, Cocolios, T. E., additional, Day Goodacre, T., additional, de Roubin, A., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Fink, D. A., additional, Gaffney, L. P., additional, Ghys, L., additional, Harding, R. D., additional, Huyse, M., additional, Imai, N., additional, Joss, D. T., additional, Kreim, S., additional, Lunney, D., additional, Lynch, K. M., additional, Manea, V., additional, Marsh, B. A., additional, Martinez Palenzuela, Y., additional, Molkanov, P. L., additional, Neidherr, D., additional, O’Neill, G. G., additional, Page, R. D., additional, Prosnyak, S. D., additional, Rosenbusch, M., additional, Rossel, R. E., additional, Rothe, S., additional, Schweikhard, L., additional, Seliverstov, M. D., additional, Sels, S., additional, Skripnikov, L. V., additional, Stott, A., additional, Van Beveren, C., additional, Verstraelen, E., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2023
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10. TRIGA-SPEC: A setup for mass spectrometry and laser spectroscopy at the research reactor TRIGA Mainz

Author

Ketelaer, J., Krämer, J., Beck, D., Blaum, K., Block, M., Eberhardt, K., Eitel, G., Ferrer, R., Geppert, C., George, S., Herfurth, F., Ketter, J., Nagy, Sz., Neidherr, D., Neugart, R., Nörtershäuser, W., Repp, J., Smorra, C., Trautmann, N., and Weber, C.

Subjects
Nuclear Experiment
Abstract

The research reactor TRIGA Mainz is an ideal facility to provide neutron-rich nuclides with production rates sufficiently large for mass spectrometric and laser spectroscopic studies. Within the TRIGA-SPEC project, a Penning trap as well as a beam line for collinear laser spectroscopy are being installed. Several new developments will ensure high sensitivity of the trap setup enabling mass measurements even on a single ion. Besides neutron-rich fission products produced in the reactor, also heavy nuclides such as 235-U or 252-Cf can be investigated for the first time with an off-line ion source. The data provided by the mass measurements will be of interest for astrophysical calculations on the rapid neutron-capture process as well as for tests of mass models in the heavy-mass region. The laser spectroscopic measurements will yield model-independent information on nuclear ground-state properties such as nuclear moments and charge radii of neutron-rich nuclei of refractory elements far from stability. This publication describes the experimental setup as well as its present status., Comment: 20 pages, 17 figures

Published
2008
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15. Recent exploits of the ISOLTRAP mass spectrometer

Author

Kreim, S., Atanasov, D., Beck, D., Blaum, K., Böhm, Ch., Borgmann, Ch., Breitenfeldt, M., Cocolios, T.E., Fink, D., George, S., Herlert, A., Kellerbauer, A., Köster, U., Kowalska, M., Lunney, D., Manea, V., Minaya Ramirez, E., Naimi, S., Neidherr, D., Nicol, T., Rossel, R.E., Rosenbusch, M., Schweikhard, L., Stanja, J., Wienholtz, F., Wolf, R.N., and Zuber, K.

Published
2013
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17. Trap-assisted decay spectroscopy with ISOLTRAP

Author

Kowalska, M., Naimi, S., Agramunt, J., Algora, A., Beck, D., Blank, B., Blaum, K., Böhm, Ch., Borgmann, Ch., Breitenfeldt, M., Fraile, L.M., George, S., Herfurth, F., Herlert, A., Kreim, S., Lunney, D., Minaya-Ramirez, E., Neidherr, D., Rosenbusch, M., Rubio, B., Schweikhard, L., Stanja, J., and Zuber, K.

Published
2012
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21. PUMA, antiProton unstable matter annihilation

Author

Aumann, T., Bartmann, W., Boine-Frankenheim, O., Bouvard, A., Broche, A., Butin, F., Calvet, D., Carbonell, J., Chiggiato, P., de Gersem, H., de Oliveira, R., Dobers, T., Ehm, F., Somoza, J.Ferreira, Fischer, J., Fraser, M., Friedrich, E., Frotscher, A., Gomez-Ramos, M., Grenard, J.L., Hobl, A., Hupin, G., Husson, A., Indelicato, P., Johnston, K., Klink, C., Kubota, Y., Lazauskas, R., Malbrunot-Ettenauer, S., Marsic, N., O Müller, W.F., Naimi, S., Nakatsuka, N., Necca, R., Neidherr, D., Neyens, G., Obertelli, A., Ono, Y., Pasinelli, S., Paul, N., Pollacco, E.C., Rossi, D., Scheit, H., Schlaich, M., Schmidt, A., Schweikhard, L., Seki, R., Sels, S., Siesling, E., Uesaka, T., Vilén, M., Wada, M., Wienholtz, F., Wycech, S., Zacarias, S., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Kastler Brossel (LKB [Collège de France]), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and PUMA

Subjects
CERN Lab, experimental methods, Nuclear Theory, p: density, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], sensitivity, annihilation, nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Physics - Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics::Atomic Physics, nucleus: density, Detectors and Experimental Techniques, nucleus: surface, Nuclear Experiment, activity report
Abstract

International audience; PUMA, antiProton Unstable Matter Annihilation, is a nuclear-physics experiment at CERN aiming at probing the surface properties of stable and rare isotopes by use of low-energy antiprotons. Low-energy antiprotons offer a very unique sensitivity to the neutron and proton densities at the annihilation site, i.e. in the tail of the nuclear density. Today, no facility provides a collider of low-energy radioactive ions and low-energy antiprotons: while not being a collider experiment, PUMA aims at transporting one billion antiprotons from ELENA, the Extra-Low-ENergy Antiproton ring, to ISOLDE, the rare-isotope beam facility of CERN. PUMA will enable the capture of low-energy antiprotons by short-lived nuclei and the measurement of the emitted radiations. In this way, PUMA will give access to the so-far largely unexplored isospin composition of the nuclear-radial-density tail of radioactive nuclei. The motivations, concept and current status of the PUMA experiment are presented.

Published
2022
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24. Masses of exotic calcium isotopes pin down nuclear forces

Author

Wienholtz, F., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R.B., George, S., Herfurth, F., D.Holt, J., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Menendez, J., Neidherr, D., Rosenbusch, M., Schweikhard, L., Schwenk, A., Simonis, J., Stanja, J., Wolf, R.N., and Zuber, K.

Subjects
Calcium -- Properties, Isotopes -- Properties, Nuclear forces (Physics) -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The properties of exotic nuclei on the verge of existence play a fundamental part in our understanding of nuclear interactions (1). Exceedingly neutron-rich nuclei become sensitive to new aspects of nuclear forces (2). Calcium, with its doubly magic isotopes [sup.40]Ca and [sup.48]Ca, is an ideal test for nuclear shell evolution, from the valley of stability to the limits of existence. With a closed proton shell, the calcium isotopes mark the frontier for calculations with three-nucleon forces from chiral effective field theory (3-6). Whereas predictions for the masses of [sup.51]Ca and [sup.52]Ca have been validated by direct measurements (4), it is an open question as to how nuclear masses evolve for heavier calcium isotopes. Here we report the mass determination of the exotic calcium isotopes [sup.53]Ca and [sup.54]Ca, using the multi-reflection time-of-flight mass spectrometer (7) of ISOLTRAP at CERN. The measured masses unambiguously establish a prominent shell closure at neutron number N= 32, in excellent agreement with our theoretical calculations. These results increase our understanding of neutron-rich matter and pin down the subtle components of nuclear forces that are at the forefront of theoretical developments constrained by quantum chromodynamics (8)., Exotic nuclei with extreme neutron-to-proton asymmetries exhibit shell structures generated by unexpected orderings of shell occupations. Their description poses enormous challenges, because most theoretical models have been developed for nuclei [...]

Published
2013

27. MATS and LaSpec: High-precision experiments using ion traps and lasers at FAIR

Author

Rodríguez, D., Blaum, K., Nörtershäuser, W., Ahammed, M., Algora, A., Audi, G., Äystö, J., Beck, D., Bender, M., Billowes, J., Block, M., Böhm, C., Bollen, G., Brodeur, M., Brunner, T., Bushaw, B.A., Cakirli, R.B., Campbell, P., Cano-Ott, D., Cortés, G., Crespo López-Urrutia, J.R., Das, P., Dax, A., De, A., Delheij, P., Dickel, T., Dilling, J., Eberhardt, K., Eliseev, S., Ettenauer, S., Flanagan, K.T., Ferrer, R., García-Ramos, J.-E., Gartzke, E., Geissel, H., George, S., Geppert, C., Gómez-Hornillos, M.B., Gusev, Y., Habs, D., Heenen, P.-H., Heinz, S., Herfurth, F., Herlert, A., Hobein, M., Huber, G., Huyse, M., Jesch, C., Jokinen, A., Kester, O., Ketelaer, J., Kolhinen, V., Koudriavtsev, I., Kowalska, M., Krämer, J., Kreim, S., Krieger, A., Kühl, T., Lallena, A.M., Lapierre, A., Le Blanc, F., Litvinov, Y.A., Lunney, D., Martínez, T., Marx, G., Matos, M., Minaya-Ramirez, E., Moore, I., Nagy, S., Naimi, S., Neidherr, D., Nesterenko, D., Neyens, G., Novikov, Y.N., Petrick, M., Plaß, W.R., Popov, A., Quint, W., Ray, A., Reinhard, P.-G., Repp, J., Roux, C., Rubio, B., Sánchez, R., Schabinger, B., Scheidenberger, C., Schneider, D., Schuch, R., Schwarz, S., Schweikhard, L., Seliverstov, M., Solders, A., Suhonen, M., Szerypo, J., Taín, J.L., Thirolf, P.G., Ullrich, J., Van Duppen, P., Vasiliev, A., Vorobjev, G., Weber, C., Wendt, K., Winkler, M., Yordanov, D., and Ziegler, F.

Published
2010
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28. Preparing a journey to the east of 208Pb with ISOLTRAP: Isobaric purification at A = 209 and new masses for 211-213Fr and 211Ra

Author

Kowalska, M., Naimi, S., Agramunt, J., Algora, A., Audi, G., Beck, D., Blank, B., Blaum, K., Böhm, Ch., Breitenfeldt, M., Estevez, E., Fraile, L. M., George, S., Herfurth, F., Herlert, A., Kellerbauer, A., Lunney, D., Minaya-Ramirez, E., Neidherr, D., Olaizola, B., Riisager, K., Rosenbusch, M., Rubio, B., Schwarz, S., Schweikhard, L., and Warring, U.

Published
2009
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29. Examining the N=28 shell closure through high-precision mass measurements of 46–48Ar

Author

Mougeot, M., Atanasov, D., Barbieri, C., Blaum, K., Breitenfeld, M., De Roubin, A., Duguet, T., George, S., Herfurth, F., Herlert, A., Holt, J.D., Karthein, J., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Rosenbusch, M., Schweikhard, L., Schwenk, A., Somà, V., Welker, A., Wienholtz, F., Wolf, R.N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], nucl-th, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure, nucl-ex, Nuclear Theory (nucl-th), Nuclear Physics - Theory, Physics::Atomic and Molecular Clusters, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

The strength of the $N$ = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of $^{46-48}$Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the $N$ = 28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the \emph{SDPF-U} phenomenological shell model interaction. Our results are also compared with \emph{ab initio} calculations using the Valence Space In-Medium Similarity Renormalization Group and the Self-Consistent Green's Function approaches. Both calculations provide a very good account of mass systematics at and around $Z$ = 18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that $^{46}$Ar is the transition between the closed-shell $^{48}$Ca and collective $^{44}$S., 17 pages, 14 figures

Published
2020
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30. Examining the N=28 shell closure through high-precision mass measurements of Ar46-48

Author

Mougeot, M, Atanasov, D, Barbieri, C, Blaum, K, Breitenfeld, M, de Roubin, A, Duguet, T, George, S, Herfurth, F, Herlert, A, Holt, JD, Karthein, J, Lunney, D, Manea, V, Navratil, P, Neidherr, D, Rosenbusch, M, Schweikhard, L, Schwenk, A, Soma, V, Welker, A, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
CHARGE RADII, MODEL, ENERGY, Science & Technology, Physics, Nuclear, NUCLEI, SPECTROMETRY, MOMENTS, Physics, NEUTRON-RICH ISOTOPES, Physical Sciences, ATOMIC MASS, TRAP
Abstract

ispartof: PHYSICAL REVIEW C vol:102 issue:1 status: published

Published
2020

31. Shape coexistence in $^187Au$ studied by laser spectroscopy

Author

Barzakh, A. E., Atanasov, D., Andreyev, A. N., Monthery, M. Al, Althubiti, N. A., Andel, B., Antalic, S., Blaum, K., Cocolios, T. E., Cubiss, J. G., Van Duppen, P., Goodacre, T. Day, de Roubin, A., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Fink, D. A., Gaffney, L. P., Ghys, L., Harding, R. D., Huyse, M., Imai, N., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Palenzuela, Y. Martinez, Molkanov, P. L., Neidherr, D., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Sels, S., Van Beveren, C., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R. N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Physics::Atomic and Molecular Clusters, ddc:530, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Präzisionsexperimente - Abteilung Blaum, Nuclear Structure
Abstract

Physical review / C 101(6), 064321 (2020). doi:10.1103/PhysRevC.101.064321, Published by APS, Woodbury, NY

Published
2020
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32. Erratum: QEC-value determination for 21Na → 21Ne and 23Mg → 23 Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility [Phys. Rev. C 100, 015502 (2019)

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, S., Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Published
2020

33. Hyperfine anomaly in gold and magnetic moments of Iπ=11/2− gold isomers

Author

Barzakh, A., Atanasov, D., Andreyev, A., Al Monthery, M., Althubiti, N., Andel, B., Antalic, S., Blaum, K., Cocolios, T., Cubiss, J., Duppen, P., Goodacre, T., de Roubin, A., Demidov, Y., Farooq-Smith, G., Fedorov, D., Fedosseev, V., Fink, D., Gaffney, L., Ghys, L., Harding, R., Joss, D., Herfurth, F., Huyse, M., Imai, N., Kozlov, M., Kreim, S., Lunney, D., Lynch, K., Manea, V., Marsh, B., Palenzuela, Y., Molkanov, P., Neidherr, D., Page, R., Rosenbusch, M., Rossel, R., Rothe, S., Schweikhard, L., Seliverstov, M., Sels, S., Beveren, C., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Abstract

ispartof: Physical Review C vol:101 issue:3 pages:034308-1-034308-9 status: published

Published
2020

34. Laser-assisted decay spectroscopy and mass spectrometry of $^{178}\mathrm{Au}$

Author

Cubiss, J.G., Andreyev, A.N., Barzakh, A.E., Manea, V., Al Monthery, M., Althubiti, N.A., Andel, B., Antalic, S., Atanasov, D., Blaum, K., Cocolios, T.E., Day Goodacre, T., De Roubin, A., Farooq-Smith, G.J., Fedorov, D.V., Fedosseev, V.N., Fink, D.A., Gaffney, L.P., Ghys, L., Harding, R.D., Herfurth, F., Huyse, M., Imai, N., Joss, D.T., Kreim, S., Lunney, D., Lynch, K.M., Marsh, B.A., Martinez Palenzuela, Y., Molkanov, P.L., Neidherr, D., O'Neill, G.G., Page, R.D., Rosenbusch, M., Rossel, R.E., Rothe, S., Schweikhard, L., Seliverstov, M.D., Sels, S., Stott, A., Van Beveren, C., Van Duppen, P., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R.N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS]Physics [physics], Nuclear Experiment
Abstract

International audience; A comprehensive study of the isotope $^{178}$Auhas been made at the CERN-ISOLDE facility, using resonance laser ionization. Two long-lived states in$^{178}$Auwere identified—a low-spin ground state and a high-spin isomer—each of which were produced as pure beams. Using the ISOLTRAP precision Penning trap, the excitation energy of the isomeric state in$^{178}$Auwas determined to be$E$$^{*}$=189(14)keV. Theα-decay fine structure patterns of the two states were studied using the Windmill decay station, providing information on the low-lying states in the daughter nucleus$^{174}$Ir. Nuclear spin assignments of$I$($^{178}$Au$^{g}$)=(2,3)and$I$($^{178}$Aum)=(7,8)are made based on the observed$\beta$-decay feeding and hyperfine structure intensity patterns. These spin assignments are used for fitting the hyperfine structures of the two states from which values for the magnetic dipole moments are extracted. The extracted moments are compared with calculations using additivity relations to establish the most probable configurations for$^{178}$Au$^{g,m}$.

Published
2020
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36. Mass measurements of short-lived nuclides using the Isoltrap preparation Penning trap

Author

Naimi, S., primary, Rosenbusch, M., additional, Audi, G., additional, Blaum, K., additional, Böhm, Ch., additional, Borgmann, Ch., additional, Breitenfeldt, M., additional, George, S., additional, Herfurth, F., additional, Herlert, A., additional, Kowalska, M., additional, Kreim, S., additional, Lunney, D., additional, Minaya-Ramirez, E., additional, Neidherr, D., additional, Schweikhard, L., additional, and Wang, M., additional

Published
2011
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37. Laser-assisted decay spectroscopy and mass spectrometry of Au178

Author

Cubiss, J. G., primary, Andreyev, A. N., additional, Barzakh, A. E., additional, Manea, V., additional, Monthery, M. Al, additional, Althubiti, N. A., additional, Andel, B., additional, Antalic, S., additional, Atanasov, D., additional, Blaum, K., additional, Cocolios, T. E., additional, Goodacre, T. Day, additional, de Roubin, A., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Fink, D. A., additional, Gaffney, L. P., additional, Ghys, L., additional, Harding, R. D., additional, Herfurth, F., additional, Huyse, M., additional, Imai, N., additional, Joss, D. T., additional, Kreim, S., additional, Lunney, D., additional, Lynch, K. M., additional, Marsh, B. A., additional, Palenzuela, Y. Martinez, additional, Molkanov, P. L., additional, Neidherr, D., additional, O'Neill, G. G., additional, Page, R. D., additional, Rosenbusch, M., additional, Rossel, R. E., additional, Rothe, S., additional, Schweikhard, L., additional, Seliverstov, M. D., additional, Sels, S., additional, Stott, A., additional, Van Beveren, C., additional, Van Duppen, P., additional, Verstraelen, E., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2020
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38. Laser-assisted decay spectroscopy for the ground states of Au180,182

Author

Harding, R. D., primary, Andreyev, A. N., additional, Barzakh, A. E., additional, Atanasov, D., additional, Cubiss, J. G., additional, Van Duppen, P., additional, Al Monthery, M., additional, Althubiti, N. A., additional, Andel, B., additional, Antalic, S., additional, Blaum, K., additional, Cocolios, T. E., additional, Day Goodacre, T., additional, de Roubin, A., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Fink, D. A., additional, Gaffney, L. P., additional, Ghys, L., additional, Joss, D. T., additional, Herfurth, F., additional, Huyse, M., additional, Imai, N., additional, Kreim, S., additional, Lunney, D., additional, Lynch, K. M., additional, Manea, V., additional, Marsh, B. A., additional, Martinez Palenzuela, Y., additional, Molkanov, P. L., additional, Neidherr, D., additional, Page, R. D., additional, Pastore, A., additional, Rosenbusch, M., additional, Rossel, R. E., additional, Rothe, S., additional, Schweikhard, L., additional, Seliverstov, M. D., additional, Sels, S., additional, Van Beveren, C., additional, Verstraelen, E., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2020
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39. Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

Author

Mougeot, M., primary, Atanasov, D., additional, Barbieri, C., additional, Blaum, K., additional, Breitenfeld, M., additional, de Roubin, A., additional, Duguet, T., additional, George, S., additional, Herfurth, F., additional, Herlert, A., additional, Holt, J. D., additional, Karthein, J., additional, Lunney, D., additional, Manea, V., additional, Navrátil, P., additional, Neidherr, D., additional, Rosenbusch, M., additional, Schweikhard, L., additional, Schwenk, A., additional, Somà, V., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2020
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40. Shape coexistence in Au187 studied by laser spectroscopy

Author

Barzakh, A. E., primary, Atanasov, D., additional, Andreyev, A. N., additional, Monthery, M. Al, additional, Althubiti, N. A., additional, Andel, B., additional, Antalic, S., additional, Blaum, K., additional, Cocolios, T. E., additional, Cubiss, J. G., additional, Van Duppen, P., additional, Goodacre, T. Day, additional, de Roubin, A., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Fink, D. A., additional, Gaffney, L. P., additional, Ghys, L., additional, Harding, R. D., additional, Huyse, M., additional, Imai, N., additional, Kreim, S., additional, Lunney, D., additional, Lynch, K. M., additional, Manea, V., additional, Marsh, B. A., additional, Palenzuela, Y. Martinez, additional, Molkanov, P. L., additional, Neidherr, D., additional, Rosenbusch, M., additional, Rossel, R. E., additional, Rothe, S., additional, Schweikhard, L., additional, Seliverstov, M. D., additional, Sels, S., additional, Van Beveren, C., additional, Verstraelen, E., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2020
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41. Erratum: QEC -value determination for Na21→Ne21 and Mg23→Na23 mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility [Phys. Rev. C 100 , 015502 (2019)]

Author

Karthein, J., primary, Atanasov, D., additional, Blaum, K., additional, Breitenfeldt, M., additional, Bondar, V., additional, George, S., additional, Hayen, L., additional, Lunney, D., additional, Manea, V., additional, Mougeot, M., additional, Neidherr, D., additional, Schweikhard, L., additional, Severijns, N., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2020
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42. Hyperfine anomaly in gold and magnetic moments of Iπ=11/2− gold isomers

Author

Barzakh, A. E., primary, Atanasov, D., additional, Andreyev, A. N., additional, Al Monthery, M., additional, Althubiti, N. A., additional, Andel, B., additional, Antalic, S., additional, Blaum, K., additional, Cocolios, T. E., additional, Cubiss, J. G., additional, Van Duppen, P., additional, Goodacre, T. Day, additional, de Roubin, A., additional, Demidov, Yu. A., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Fink, D. A., additional, Gaffney, L. P., additional, Ghys, L., additional, Harding, R. D., additional, Joss, D. T., additional, Herfurth, F., additional, Huyse, M., additional, Imai, N., additional, Kozlov, M. G., additional, Kreim, S., additional, Lunney, D., additional, Lynch, K. M., additional, Manea, V., additional, Marsh, B. A., additional, Martinez Palenzuela, Y., additional, Molkanov, P. L., additional, Neidherr, D., additional, Page, R. D., additional, Rosenbusch, M., additional, Rossel, R. E., additional, Rothe, S., additional, Schweikhard, L., additional, Seliverstov, M. D., additional, Sels, S., additional, Van Beveren, C., additional, Verstraelen, E., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional

Published
2020
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43. First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers

Author

Manea, V., primary, Karthein, J., additional, Atanasov, D., additional, Bender, M., additional, Blaum, K., additional, Cocolios, T. E., additional, Eliseev, S., additional, Herlert, A., additional, Holt, J. D., additional, Huang, W. J., additional, Litvinov, Yu. A., additional, Lunney, D., additional, Menéndez, J., additional, Mougeot, M., additional, Neidherr, D., additional, Schweikhard, L., additional, Schwenk, A., additional, Simonis, J., additional, Welker, A., additional, Wienholtz, F., additional, and Zuber, K., additional

Published
2020
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44. Q(EC)-value determination for Na-21 -> Ne-21 and Mg-23 -> Na-23 mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility

Author

Karthein, J, Atanasov, D, Blaum, K, Breitenfeldt, M, Bondar, V, George, S, Hayen, L, Lunney, D, Manea, V, Mougeot, M, Neidherr, D, Schweikhard, L, Severijns, N, Welker, A, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
Science & Technology, Physics, Nuclear, Physics, Physical Sciences, ION-SOURCE, TRAP
Abstract

ispartof: PHYSICAL REVIEW C vol:100 issue:1 status: published

Published
2019

45. QEC-value determination for 21Na→21Ne and 23Mg→23Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at ISOLDE/CERN

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, S., Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Abstract

We report on high-precision $Q_{\textrm{EC}}$ values of the $^{21}$Na$\rightarrow^{21}$Ne and $^{23}$Mg$\rightarrow^{23}$Na mirror $\beta$-transitions from mass measurements with ISOLTRAP at ISOLDE/CERN. A precision of $\delta m/m = 9 \cdot 10^{-10}$ and $\delta m/m = 1.5 \cdot 10^{-9}$ was reached for the masses of $^{21}$Na and $^{23}$Mg, respectively. We reduce the uncertainty of the $Q_{\textrm{EC}}$ values by a factor five, making them the most precise experimental input data for the calculation of the corrected $\mathcal{F} t$-value of these mixed Fermi/Gamow-Teller transitions. For the $^{21}$Na$\rightarrow^{21}$Ne $Q_{\textrm{EC}}$ value, a $2.3 \sigma$ deviation from the literature $Q_{\textrm{EC}}$-value was found.

Published
2019

46. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in At-217,At-218,At-219 revealed by in-source laser spectroscopy

Author

Barzakh, AE, Cubiss, JG, Andreyev, AN, Seliverstov, MD, Andel, B, Antalic, S, Ascher, P, Atanasov, D, Beck, D, Bieron, J, Blaum, K, Borgmann, Ch, Breitenfeldt, M, Capponi, L, Cocolios, TE, Goodacre, T Day, Derkx, X, De Witte, H, Elseviers, J, Fedorov, DV, Fedosseev, VN, Fritzsche, S, Gaffney, LP, George, S, Ghys, L, Hessberger, FP, Huyse, M, Imai, N, Kalaninova, Z, Kisler, D, Koester, U, Kowalska, M, Kreim, S, Lane, JFW, Liberati, V, Lunney, D, Lynch, KM, Manea, V, Marsh, BA, Mitsuoka, S, Molkanov, PL, Nagame, Y, Neidherr, D, Nishio, K, Ota, S, Pauwels, D, Popescu, L, Radulov, D, Rapisarda, E, Revi, JP, Rosenbusch, M, Rossel, RE, Rothe, S, Sandhu, K, Schweikhard, L, Sels, S, Truesdale, VL, Van Beveren, C, Van den Bergh, P, Van Duppen, P, Wakabayashi, Y, Wendt, KDA, Wienholtz, F, Whitmore, BW, Wilson, GL, Wolf, RN, and Zuber, K

Published
2019

47. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217,218,219At revealed by in-source laser spectroscopy

Author

Barzakh, A. E., Cubiss, J. G., Andreyev, A. N., Seliverstov, M. D., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroifmmode nelse, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T. E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, V. N., Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Heßberger, F. P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J. F. W., Liberati, V., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K. D. A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R. N., and Zuber, K.

Subjects
Physics::Atomic Physics, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in At217,218,219 have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope At218 has been found to be larger than the average of its even-N neighbors, At217,219. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of At218 also supports the possible presence of octupole collectivity in the considered nuclei. ispartof: Physical Review C vol:99 issue:5 status: published

Published
2019

48. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $^{217,218,219}At$ revealed by in-source laser spectroscopy

Author

Barzakh, A. E., Cubiss, J. G., Andreyev, A. N., Seliverstov, M. D., Adel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroń, Jacek, Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T. E., Day Goodacre, T., Derex, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, N. V., Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Heßberger, F. P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Koster, U., Kowalska, M., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulow, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K. D. A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R. N., and Zuber, K.

Published
2019

49. QEC -value determination for $^{21}$Na$\rightarrow^{21}$Ne and $^{23}$Mg$\rightarrow^{23}$Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, Sebastian, Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R.N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

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

International audience; We report on high-precision QEC values of the Na21→Ne21 and Mg23→Na23 mirror β transitions from mass measurements with ISOLTRAP at the CERN ISOLDE facility. A precision of δm/m=9×10−10 and δm/m=1.5×10−9 was reached for the masses of Na21 and Mg23, respectively. We reduce the uncertainty of the QEC values by a factor of 5, making them the most precise experimental input data for the calculation of the corrected Ft value of these mixed Fermi and Gamow-Teller transitions. For the Na21→Ne21QEC value, a 2.3σ deviation from the literature QEC value was found.

Published
2019
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50. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $^{217,218,219}\mathrm{At}$ revealed by in-source laser spectroscopy

Author

Barzakh, A.E., Cubiss, J.G., Andreyev, A.N., Seliverstov, M.D., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroń, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T.E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D.V., Fedosseev, V.N., Fritzsche, S., Gaffney, L.P., George, S., Ghys, L., Heßberger, F.P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J.F.W., Liberati, V., Lunney, D., Lynch, K.M., Manea, V., Marsh, B.A., Mitsuoka, S., Molkanov, P.L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J.P., Rosenbusch, M., Rossel, R.E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V.L., Van Beveren, C., Van Den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K.D.A., Wienholtz, F., Whitmore, B.W., Wilson, G.L., Wolf, R.N., Zuber, K., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

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

International audience; Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in $^{217,218,219}$At have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope $^{218}$At has been found to be larger than the average of its even-$N$ neighbors, $^{217,219}$At. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of $^{218}$At also supports the possible presence of octupole collectivity in the considered nuclei.

Published
2019
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