Collective states in 48V

The low-lying positive parity states of 48V have been studied in the framework of deformed configuration mixing model calculations based on projected Hartree-Fock theory, within the full fp shell space. The modified Kuo-Brown effective interaction has been used. The calculated spectrum and the electromagnetic properties of these states are in good agreement with the experiment. The calculation predicts an excited low-lying collective K=2+ band in the spectrum of 48V and accounts for the observed breakdown of the 'signature' selection rule arising in the shell-model calculation within the (fsub(7/2))sup(n) space. It does not favour a 5+ assignment to the observed 1.099 MeV level. Two sets of proton and neutron effective charges (i)esub(p)=1.32e and esub(n)=0.89e and (ii) Kuo and Osnes charges esub(p)=1.25e and esub(n)=0.47e were employed. The observed decay properties appear to favour the latter charges. The model also explains in a semiquantitive way the observed K-value, moment of inertia parameter and the intrinsic quadrupole moment of the K=1- rotational band. (Auth.)