TY  - JOUR
AU  - IDS Collaboration (Stryjczyk, M. et al
AU  - Nacher, E.
PY  - 2020
DA  - 2020//
TI  - Decay studies of the long-lived states in Tl-186
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 024322
EP  - 9pp
VL  - 102
IS  - 2
PB  - Amer Physical Soc
AB  - 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.
SN  - 0556-2813
UR  - https://arxiv.org/abs/2006.02161
UR  - https://doi.org/10.1103/PhysRevC.102.024322
DO  - 10.1103/PhysRevC.102.024322
LA  - English
N1  - WOS:000562378100002
ID  - IDSCollaborationStryjczyk+Nacher2020
ER  -