https://doi.org/10.1140/epja/i2005-10258-0
Nuclear Structure and Reactions
Beta decay of the proton-rich nuclei 102Sn and 104Sn
1
Institute of Experimental Physics, University of Warsaw, Poland
2
St. Petersburg Nuclear Physics Institute, Russia
3
Gesellschaft für Schwerionenforschung, Darmstadt, Germany
4
University of Sofia, Bulgaria
5
NSCL, Department of Physics and Astronomy, Michigan State University, USA
6
Technische Universität München, Germany
7
Departamento de Fisica Teórica, Universidad Autonoma de Madrid, Spain
8
Taras Shevchenko Kiev National University, Ukraine
9
Dipartimento Scienze Fisiche, Università “Federico II” and INFN Napoli, Italy
10
Nuclear Science Center, New Delhi, India
11
Oak Ridge National Laboratory, USA
12
Continental Teves AG & Co., Frankfurt am Main, Germany
13
Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, Dresden, Germany
* e-mail: karny@mimuw.edu.pl
Received:
21
October
2005
Accepted:
15
February
2006
Published online:
24
March
2006
The β decays of 102Sn and 104Sn were studied by using high-resolution germanium detectors as well as a Total Absorption Spectrometer (TAS). For 104Sn, with three new β-delayed γ-rays identified, the total Gamow-Teller strength (BGT) value of 2.7(3) was obtained. For 102Sn, the γ-γ coincidence data were collected for the first time, allowing us to considerably extend the decay scheme. This scheme was used to unfold the TAS data and to deduce a BGT value of 4.2(8) for this decay. This result is compared to shell model predictions, yielding a hindrance factor of 3.6(7) in agreement with those obtained previously for 98Cd and 100In. Together with the latter two, 102Sn completes the triplet of Z ⩽ 50, N ≥ 50 nuclei with two proton holes, one proton hole and one neutron particle, and two neutron particles with respect to the doubly magic 100Sn core.
PACS: 21.10.-k Properties of nuclei; nuclear energy levels – / 23.40.-s Beta decay; double β decay; electron and muon capture – / 23.20.Lv Gamma transitions and level energies – / 27.60.+j 90≤A≤149 –
© Società Italiana di Fisica and Springer-Verlag, 2006