β decay studies of the neutron-rich 56-58V isotopes -: art. no. 014311

beta decay of V-56,V-57,V-58 has been used to populate low-energy levels of Cr-56,Cr-57,Cr-58, respectively. The low-energy levels of the even-even Cr isotopes and beta-decay half-lives and branching ratios of the parent V isotopes are compared to results of shell-model calculations. The Cr energy level calculations were completed in the full pf-model space, using several different interactions. The systematic variation of E(2(1)(+)), which is indicative of a subshell closure at N=32, was best reproduced in calculations using a pf-shell-model interaction based on effective two-body matrix elements with some replacement by the G matrix.