Gamow-Teller strength distribution near Sn-100. The beta decay of In-102

摘要

In two complementary measurements, an array of high-resolution germanium detectors and a total-absorption gamma-spectrometer were used to investigate the beta decay of In-102, a one proton-hole, three-neutron particle nucleus with respect to the Sn-100 core. A total of 509 beta-delayed gamma rays (494 new) were observed for In-102, and a scheme comprising 234 levels (223 new) was constructed for the decay daughter Cd-102. The Q(EC) value of the decay and the half-life were determined, the latter one being 23.3(1) s. The summed Gamow-Teller strength deduced from the high-resolution experiment is as low as 0.60 +/- 0.07 +/- 0.11 compared to a value of 4.70 +/- 0.05 +/- 0.20 +/- 1.0 obtained from the total absorption measurement, and to a shell-model prediction of 13.3. (C) 2003 Elsevier B.V. All rights reserved. [References: 28]