Phys.Rev. C 97, 064317 (2018)

L.Gaudefroy, S.Peru, N.Arnal, J.Aupiais, J.-P.Delaroche, M.Girod, J.Libert

Impact of Coriolis mixing on a two-quasi-neutron isomer in ¹⁶⁴Gd₁₀₀ and other N=100 isotones

RADIOACTIVITY ²⁵²Cf(SF); measured fission fragments, Eγ, Iγ, (fragment)γ- and γγ-coin, half-life of a 4- isomer in ¹⁶⁴Gd using a fission chamber consisting of a metalized polyethylene terephtalate film for detection of fission fragments, and an array of eight HPGe detectors for γ rays at CEA, DAM, DIF facility. ¹⁶⁴Gd; deduced levels, J, π, 4- isomer, configuration. ¹⁶⁰Nd, ¹⁶²Sm, ¹⁶⁴Gd, ¹⁶⁶Dy, ¹⁶⁸Er, ¹⁷⁰Yb, ¹⁷²Hf; calculated levels, J, π, T_1/2 of 4- isomers, E1+M2+E3 admixtures in the γ transition from the 4- isomeric states, and compared with experimental data. Calculations involved K-mixing on top of axially symmetric-deformed QRPA approach with Gogny D1M interaction for excited states, and five-dimensional collective Hamiltonian 5DCH approach for ground states.

doi: 10.1103/PhysRevC.97.064317