Levels of 191Ir excited in the (p, 2n) and (d, 3n) reactions

Abstract

An enriched 192Os target was bombarded with protons of energy 12 to 24 MeV and deuterons of energy 19 to 28 MeV. The levels characteristics of the transitional 191Ir nucleus were investigated. Both positive and negative parity level systems observed in this nucleus show a close similarity to those observed in lighter Ir isotopes. The description of the positive parity states in terms of the Nilsson model with the Coriolis coupling and the h 11 2 system in terms of a model assuming the coupling of the odd nucleon to the rigid triaxial core are discussed. A 5.5±0.7 s isomer with excitation energy exceeding 2 MeV was identified.