Abstract
Decay spectroscopy of the long-lived states in has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The decay from the low-spin state in was observed for the first time and a half-life of s was determined. Based on the -decay energy, the relative positions of the long-lived states were fixed, with the state as the ground state, the state at 77(56) keV, and the state at 451(56) keV. The level scheme of the internal decay of the () state [ s], which was known to decay solely through emission of 374-keV -ray transition, was extended and a lower limit for the -decay branching was determined. The extracted retardation factors for the decay of the state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the shell in the isomeric decay and significant structure differences between and .
5 More- Received 3 June 2020
- Accepted 24 July 2020
DOI:https://doi.org/10.1103/PhysRevC.102.024322
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Published by the American Physical Society