Beta Decay of the 134In Nucleus and Properties of N ≥ 81 Odd-Odd Neutron-Rich Indium Isotopes

Abstract

The beta decay of the ¹³⁴In nucleus, which is a neutron-rich odd-odd nucleus and which has an anomalously long lifetime, is studied in detail, and an attempt is made to determine its ground-state spin on this basis. The ¹³¹Cd → ¹³¹In beta-decay process is used as a guideline for finding the required matrix element. An analysis of the features of splitting of the \(\left\{\left(\nu 2 f_{7/ 2} \right)^{n_{\text{odd}}},\left(\pi 1 g_{9 / 2}\right)^{-1}\right\}\) neutron-proton configuration, which is the lowest one and which determines properties of the spectrum of the lowest states of indium isotopes, is also performed for 83 ≤ N ≤ 89 in this connection.