Smooth band termination at high spin in I-113 - art. no. 014304

The I-113 nucleus has been studied using the Ni-58(Ni-58,3p) reaction at 25 0 MeV with the Gammasphere/ Microball facility. Gamma-ray three- and four-f old data gated by charged particle combinations were analyzed. Multipolarit ies of the gamma rays were assigned following the angular correlation measu rements. The present study is focused on the high spin properties, where th e structure is dominated by 2p-2h excitations across the Z=50 gap. Ten deco upled bands showing the features of smooth band termination were observed; three of those bands are linked to known low-spin states, which allows the identification of configurations by direct comparisons with configuration-d ependent cranked Nilsson-Strutinsky calculations. The yrast band, which was linked along with the signature partner, was followed up to (101/2(+)) and (h) over bar omega similar to1.3 MeV. The other linked band was a negative -parity band observed up to (95/2(-)). Tentative configurations for the unl inked bands are discussed. Comparisons with the theoretical results suggest that the band built on a configuration involving the neutron i(13/2) intru der orbital originating from the N=6 harmonic oscillator subshell was obser ved in this experiment.