Superallowed Gamow–Teller decay of the doubly magic nucleus 100Sn

C. B. Hinke, M. Böhmer, P. Boutachkov, T. Faestermann (), H. Geissel, J. Gerl, R. Gernhäuser, M. Górska, A. Gottardo, H. Grawe, J. L. Grębosz, R. Krücken, N. Kurz, Z. Liu, L. Maier, F. Nowacki, S. Pietri, Zs. Podolyák, K. Sieja, K. Steiger, K. Straub, H. Weick, H.-J. Wollersheim, P. J. Woods, N. Al-Dahan, N. Alkhomashi, A. Ataç, A. Blazhev, N. F. Braun, I. T. Čeliković, T. Davinson, I. Dillmann, C. Domingo-Pardo, P. C. Doornenbal, G. de France, G. F. Farrelly, F. Farinon, N. Goel, T. C. Habermann, R. Hoischen, R. Janik, M. Karny, A. Kaşkaş, I. M. Kojouharov, Th. Kröll, Y. Litvinov, S. Myalski, F. Nebel, S. Nishimura, C. Nociforo, J. Nyberg, A. R. Parikh, A. Procházka, P. H. Regan, C. Rigollet, H. Schaffner, C. Scheidenberger, S. Schwertel, P.-A. Söderström, S. J. Steer, A. Stolz and P. Strmeň
Additional contact information
C. B. Hinke: Technische Universität München, D-85748 Garching, Germany
M. Böhmer: Technische Universität München, D-85748 Garching, Germany
P. Boutachkov: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
T. Faestermann: Technische Universität München, D-85748 Garching, Germany
H. Geissel: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
J. Gerl: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
R. Gernhäuser: Technische Universität München, D-85748 Garching, Germany
M. Górska: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
A. Gottardo: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
H. Grawe: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
J. L. Grębosz: The Henryk Niewodniczanski Institute of Nuclear Physics (IFJ PAN), 31-342 Krakow, Poland
R. Krücken: Technische Universität München, D-85748 Garching, Germany
N. Kurz: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
Z. Liu: School of Physics & Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, UK
L. Maier: Technische Universität München, D-85748 Garching, Germany
F. Nowacki: Université de Strasbourg, IPHC, 67037 Strasbourg Cedex, France
S. Pietri: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
Zs. Podolyák: University of Surrey, Guildford GU2 7XH, UK
K. Sieja: Université de Strasbourg, IPHC, 67037 Strasbourg Cedex, France
K. Steiger: Technische Universität München, D-85748 Garching, Germany
K. Straub: Technische Universität München, D-85748 Garching, Germany
H. Weick: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
H.-J. Wollersheim: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
P. J. Woods: School of Physics & Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, UK
N. Al-Dahan: University of Surrey, Guildford GU2 7XH, UK
N. Alkhomashi: University of Surrey, Guildford GU2 7XH, UK
A. Ataç: Faculty of Science, Ankara University, 06100 Tandogan, Ankara, Turkey
A. Blazhev: Institute of Nuclear Physics, University of Cologne, D-50937 Köln, Germany
N. F. Braun: Institute of Nuclear Physics, University of Cologne, D-50937 Köln, Germany
I. T. Čeliković: Institute Vinca, University of Belgrade, 11000 Belgrade, Serbia
T. Davinson: School of Physics & Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, UK
I. Dillmann: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
C. Domingo-Pardo: IFIC, CSIC-University of Valencia, E-46071 Valencia, Spain
P. C. Doornenbal: RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
G. de France: Grand Accélérateur National d’Ions Lourds, CEA/DSM-CNRS/IN2P3, 14076 Caen, France
G. F. Farrelly: University of Surrey, Guildford GU2 7XH, UK
F. Farinon: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
N. Goel: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
T. C. Habermann: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
R. Hoischen: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
R. Janik: Comenius University, 818 06 Bratislava 16, Slovakia
M. Karny: Institute of Experimental Physics, University of Warsaw, PL-00681 Warsaw, Poland
A. Kaşkaş: Faculty of Science, Ankara University, 06100 Tandogan, Ankara, Turkey
I. M. Kojouharov: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
Th. Kröll: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
Y. Litvinov: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
S. Myalski: The Henryk Niewodniczanski Institute of Nuclear Physics (IFJ PAN), 31-342 Krakow, Poland
F. Nebel: Technische Universität München, D-85748 Garching, Germany
S. Nishimura: RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
C. Nociforo: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
J. Nyberg: Uppsala University, SE-75120 Uppsala, Sweden
A. R. Parikh: Universitat Politecnica de Catalunya (EUETIB), E-08036 Barcelona, Spain
A. Procházka: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
P. H. Regan: University of Surrey, Guildford GU2 7XH, UK
C. Rigollet: KVI, University of Groningen, 9747AA Groningen, The Netherlands
H. Schaffner: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
C. Scheidenberger: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
S. Schwertel: Technische Universität München, D-85748 Garching, Germany
P.-A. Söderström: RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
S. J. Steer: University of Surrey, Guildford GU2 7XH, UK
A. Stolz: National Superconducting Cyclotron Laboratory, Michigan State University
P. Strmeň: Comenius University, 818 06 Bratislava 16, Slovakia

Nature, 2012, vol. 486, issue 7403, 341-345

Abstract: Abstract The shell structure of atomic nuclei is associated with ‘magic numbers’ and originates in the nearly independent motion of neutrons and protons in a mean potential generated by all nucleons. During β+-decay, a proton transforms into a neutron in a previously not fully occupied orbital, emitting a positron–neutrino pair with either parallel or antiparallel spins, in a Gamow–Teller or Fermi transition, respectively. The transition probability, or strength, of a Gamow–Teller transition depends sensitively on the underlying shell structure and is usually distributed among many states in the neighbouring nucleus. Here we report measurements of the half-life and decay energy for the decay of 100Sn, the heaviest doubly magic nucleus with equal numbers of protons and neutrons. In the β-decay of 100Sn, a large fraction of the strength is observable because of the large decay energy. We determine the largest Gamow–Teller strength so far measured in allowed nuclear β-decay, establishing the ‘superallowed’ nature of this Gamow–Teller transition. The large strength and the low-energy states in the daughter nucleus, 100In, are well reproduced by modern, large-scale shell model calculations.

Date: 2012
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DOI: 10.1038/nature11116

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