Phys.Rev. C 102, 024322 (2020)

M.Stryjczyk, for the IDS Collaboration

Decay studies of the long-lived states in ¹⁸⁶Tl

RADIOACTIVITY ¹⁸⁶Tl(α), ^186mTl(IT), (β⁺)[pure beam of ¹⁸⁶Tl from U(p, X), E=1.4 GeV spallation reaction and selective ionization using RILIS at ISOLDE-CERN facility]; measured Eα, Iα, Eγ, Iγ, ce, Eβ, αγ-, αγγ- and α(x ray)-coin, half-lives of decays of ¹⁸⁶Tl (2-) ground state and 10(-) isomer using the SPEDE spectrometer for α detection, and five HPGe clover detectors for γ rays. ¹⁸²Au; deduced levels, J, π. ¹⁸⁶Tl; deduced levels, J, π, total conversion coefficients and multipolarities, (2-) as the ground state, energies of the (7+) and 10(-) isomers, upper limit of %IT decay and lower limit of %β⁺ branching ratios from the decay of the 10(-) isomer of ¹⁸⁶Tl. ¹⁹⁰Bi; deduced energy of the (10-) isomer. ^188m,190mBi(α); analyzed previous experimental data for the decays of (10-) isomers; deduced decay widths using Rasmussen formalism. Systematics of retardation factors for M2 and E3 transitions in ^184,186,188Tl.

doi: 10.1103/PhysRevC.102.024322