Yrast structure of neutron-rich Ti53

Abstract

Î rays from neutron-rich Ti nuclei in the vicinity of N=32 have been studied at Gammasphere using deep-inelastic reactions induced by Ca48 beams on thick Pb208 and U238 targets. The Ti53 yrast cascade was identified for the first time, and the location in energy of states with spin up to I = 21/2 was determined. The excitations of Ti53 provide new tests of effective interactions for full-pf-shell calculations. Comparisons between theory and experiment for the highest spin states in Ti53 favor the recently proposed GXPF1A interaction, which accounts for the appearance of a neutron subshell closure at N=32 in Ti isotopes as well as for the lack of a similar subshell closure at N=34, as predicted by earlier calculations with another interaction. © 2005 The American Physical Society.