Development of shell closures at N=32,34. II. Lowest yrast excitations in even-even Ti isotopes from deep-inelastic heavy-ion collisions

Gamma rays from neutron-rich nuclei in the vicinity of Z = 20, N = 28 have been studied at Gammasphere using deep-inelastic reactions induced by a 330-MeV 48 Ca beam on a thick 238 U target. The yrast g -ray cascade of 56 Ti was identified for the first time and the location in energy of the 2 + ,4 + , and 6 + states was determined. The low-spin 56 Ti yrast structure does not support the presence of a subshell closure at N = 34 as suggested on the basis of other data on nuclei in the region as well as shell model calculations with a recently proposed interactionstatus: publishe