Phys.Rev. C 95, 014305 (2017)

J.Perkowski, J.Andrzejewski, Ch.Droste, L.Janiak, E.Grodner, S.G.Rohozinski, L.Prochniak, J.Srebrny, J.Samorajczyk-Pysk, T.Abraham, K.Hadynska-Klek, M.Kisielinski, M.Komorowska, M.Kowalczyk, J.Kownacki, T.Marchlewski, J.Mierzejewski, P.Napiorkowski, A.Stolarz, A.Korman, M.Zielinska

Decay of the I^πisomeric state in ¹³⁴Nd and ¹⁸⁴Pt studied by electron and gamma spectroscopy

RADIOACTIVITY ¹³⁴Nd, ¹⁸⁴Pt(IT)[from ¹²²Te(¹⁶O, 4n), E=90 MeV and ¹⁷⁵Lu(¹⁴N, 5n)¹⁸⁴Pt, E=90 MeV at the Heavy Ion Laboratory of University of Warsaw]; measured Eγ, Iγ, ce, γγ- and γ(ce)-coin, isomer half-lives using EAGLE array for γ detection and conversion-electron spectrometers; deduced levels, J, π, K-isomers, K- and L-conversion coefficients, multipolarities, mixing ratios, B(E1), B(E2), B(E3), hindrance factors for γ transitions, alignments. Comparison with VMI plus two band mixing and the Davydov-Filippov model.

NUCLEAR STRUCTURE ¹³⁴Nd, ¹⁸⁴Pt; calculated mean-field collective potential energy surfaces in (β, γ) plane, Kπ=8- isomeric state; analyzed weakening of the K-forbiddenness by rotational K-mixing (Coriolis interaction), and triaxiality (Davydov-Fillipov model).

doi: 10.1103/PhysRevC.95.014305