Abstract
A shell-model calculation of the negative-parity states in the A=36--40 nuclei is presented. The nucleus /sup 40/Ca is assumed to be an inert closed core. Active holes are restricted to the (1d/sub 3/2/,2s/sub 1/2/) configurations and an active particle is allowed to occupy the 1f/sub 7/2/ or 2p/sub 3/2/ orbit. The two-body effective interaction is assumed to be the modified surface-delta type. The energy spectra are calculated from a least-squares fit to the experimental data, varying the T=0 and T=1 strengths of particle-hole and hole-hole interactions and the three single-particle level splittings. Spectroscopic factors, E2, E3, and M1 transition rates, and two-body matrix elements are also calculated and compared with the observed values and the previous theoretical results. The validity of the weak-coupling model is also tested.
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