Research Information System
PHYSICAL REVIEW C, vol.75, no.1, 2007 (SCI-Expanded)
Excited states in Cr-46 were sought using the C-12(Ar-36,2n) reaction. Gamma rays were detected with the Gammasphere array, and the Z value of the reaction products was determined with an ionization chamber located at the focal plane of the Fragment Mass Analyzer. In addition to the ground-state band observed up to I-pi=10(+) (tentatively 12(+)), five states are proposed to belong to the 3(-) band. The mirror energy differences with the analog states in Ti-46 present a pronounced staggering effect between the odd and even spin members that is reproduced well by shell-model calculations incorporating the different Coulomb contributions, monopole, multipole, and single-particle effects together with an isospin-nonconserving interaction that accounts for the so-called J=2 anomaly. Dramatically different E1 decay patterns for members of the 3(-) band between the Cr-46 and Ti-46 mirrors are also observed.