Eur. Phys. J. A (2006) 27: 129-136
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

Abstract

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 (B_GT) 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 B_GT 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.