Structure of low-spin states in the doubly-odd Ir-182 nucleus

摘要

Low-spin states of Ir-182 were populated through the beta(+)/EC decay of Pt-182 . Two strong E2 transitions were observed for the first time: a 25.7keV transition in Ir-182 and a 34.0keV transition in Re of probable mass A = 178 . Spin and parity, I-pi = 3(+), are firmly assigned to the Ir-182 ground state (g.s.). For the excited states, the parity is established and the spin determined or restricted. These assignments support most of the interpretations of the level structure previously suggested. The systematics for the known 5(+) -> 3(+) transitions in pi h(9/2) circle times nu 1/2(-)[521] bands is presented. Using a semi-microscopic two-quasiparticle axial-rotor coupling model, particle configurations have been attributed or suggested for most of the coupled states lying at low energy in Ir-182 .