• Open Access

Decay studies of the long-lived states in Tl186

M. Stryjczyk et al. (IDS Collaboration)
Phys. Rev. C 102, 024322 – Published 18 August 2020

Abstract

Decay spectroscopy of the long-lived states in Tl186 has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The α decay from the low-spin (2) state in Tl186 was observed for the first time and a half-life of 3.40.4+0.5 s was determined. Based on the α-decay energy, the relative positions of the long-lived states were fixed, with the (2) state as the ground state, the 7(+) state at 77(56) keV, and the 10() state at 451(56) keV. The level scheme of the internal decay of the Tl186(10()) state [T1/2=3.40(9) s], which was known to decay solely through emission of 374-keV γ-ray transition, was extended and a lower limit for the β-decay branching bβ>5.9(3)% was determined. The extracted retardation factors for the γ decay of the 10() state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the πd3/2 shell in the isomeric decay and significant structure differences between Tl184 and Tl186.

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  • 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

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 102, Iss. 2 — August 2020

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