%0 Journal Article
%T Decay studies of the long-lived states in Tl-186
%A IDS Collaboration (Stryjczyk, M. et al
%A Nacher, E.
%J Physical Review C
%D 2020
%V 102
%N 2
%I Amer Physical Soc
%@ 0556-2813
%G English
%F IDSCollaborationStryjczyk+Nacher2020
%O WOS:000562378100002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4509), last updated on Tue, 08 Sep 2020 11:06:42 +0000
%X Decay spectroscopy of the long-lived states in Tl-186 has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The a decay from the low-spin (2(-)) state in Tl-186 was observed for the first time and a half-life of 3.4(-0.)(4)(+0.5) s was determined. Based on the alpha-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 Tl-186(10((-))) state [T-1/2 = 3.40(9) s], which was known to decay solely through emission of 374-keV gamma-ray transition, was extended and a lower limit for the beta-decay branching b(beta) > 5.9(3)% was determined. The extracted retardation factors for the gamma decay of the 10((-) )state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the pi d(3/2) shell in the isomeric decay and significant structure differences between Tl-184 and Tl-186.
%R 10.1103/PhysRevC.102.024322
%U https://arxiv.org/abs/2006.02161
%U https://doi.org/10.1103/PhysRevC.102.024322
%P 024322-9pp