Eur. Phys. J. A (2010) 46: 45-53
https://doi.org/10.1140/epja/i2010-11025-x

Regular Article - Experimental Physics

Systematics of Gamow-Teller beta decay “Southeast” of ¹⁰⁰Sn

¹ St. Petersburg Nuclear Physics Institute, RU-188350, Gatchina, Russia
² GSI Helmholtzzentrum für Schwerionenforschung, D-64291, Darmstadt, Germany
³ Max-Planck-Institut für Kernphysik, D-69029, Heidelberg, Germany
⁴ KVI, University of Groningen, Zernikelaan 25, NL-9747, AA Groningen, The Netherlands
⁵ Institute of Experimental Physics, University of Warsaw, Warsaw, Poland
⁶ Department of Physics, University Federico II, and INFN-Napoli, I-80126, Napoli, Italy
⁷ IFIC, E-46071, Valencia, Spain

^* e-mail: batist@pnpi.spb.ru

Received: 29 March 2010
Accepted: 17 August 2010
Published online: 11 September 2010

Abstract

The energy centroids and integrated strengths of Gamow-Teller transitions in the and electron-capture decay are analyzed for nuclei whose proton number Z and neutron number N are restricted to 44 Z 50 and 50 N 58 . The analysis is based on data measured both with high-resolution -ray spectrometry and total -ray absorption techniques. The dependence of the considered quantities on the relative neutron excess are established after taking into account the effects due to the Coulomb interaction and mean-field level occupancies. An extrapolation of this dependence to the lightest known tin isotopes is used to estimate the decay characteristics of ¹⁰⁰Sn and ¹⁰¹Sn . The values extrapolated for the half-lives of ¹⁰⁰Sn and ¹⁰¹Sn agree with experimental data. Using the extrapolated values together with shell model predictions, the Q values for the electron-capture decay of ¹⁰⁰Sn is evaluated. The quenching factor for and the electron-capture decay of the nuclei under consideration here is established to be 0.56(2) with a possible weak dependence on N - Z .