Phys.Rev. C 107, 014308 (2023)

W.Zhang, B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, C.Qi, T.Grahn, B.S.Nara Singh, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, K.Auranen, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, Y.D.Fang, P.T.Greenlees, J.Hilton, E.Ideguchi, R.Julin, S.Juutinen, M.Kumar Raju, M.Leino, H.Li, H.Liu, S.Matta, P.Subramaniam, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, C.M.Petrache, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon

Decay spectroscopy of ^{171, 172}Os and ^{171, 172, 174}Ir

NUCLEAR REACTIONS ⁹²Mo(⁸³Kr, X)¹⁷¹/¹⁷²Os/¹⁷¹/¹⁷²/¹⁷⁴Ir, E=383 MeV; measured reaction products, recoils, Eα , Iα, Eγ, Iγ, γγ-coin, (recoil)αγ-coin. ^171,172Os, ^171,172,174Ir; deduced levels, J, π, δ. Newly identified α-decay branch from the bandhead (isomeric state) of the νi_13/2 band in ¹⁷¹Os with competition between α, β, and electromagnetic decays. RITU gas-filled ion separator, GREAT spectrometer and JUROGAM II HPGe array at K130 cyclotron (JYFL).

RADIOACTIVITY ^171,171m,172Os, ^{171m,172,172m,174,174m}Ir(α);^171mOs(IT)[from ⁹²Mo(⁸³Kr, X), E=383 MeV]; measured Eα, Iα, Eγ, Iγ, x-rays, αγ-coin; deduced T_1/2, branching ratios, Q values, formation probabilities, hindrance factor, reduced widths. ^167,168W, ^167,168,170; deduced levels, J, π, transitions. ¹⁸⁰Hg, ¹⁷⁶Pt, ¹⁷²Os, ¹⁶⁸W; calculated total Routhian surface, potential energy surface. Discussed the correlation between α-decay hindrance factor and shape changes. Reaction products implanted into two adjacently mounted double-sided silicon strip detectors (DSSDs) used tp measure α, while γ-rays were detected by double sided planar HPGe. Beam from K10 cyclotron (JYFL).

doi: 10.1103/PhysRevC.107.014308