In-Beam Gamma-Ray Spectroscopy Of P37-42

The level schemes of the neutron-rich P37-42 isotopes are investigated via in-beam gamma-ray spectroscopy following the fragmentation of a Cl-45 projectile beam at intermediate beam energies. Information on gamma gamma coincidence relationships complemented by comparisons to shell-model calculations in the sd- pf model space were used to construct excitation level schemes for these neutron-rich nuclei. For the odd-mass P-37,P-39 isotopes, a level scheme is presented that appears essentially complete at low energies and exhausts the states predicted by the SDPF-MU shell-model Hamiltonian. Simple Nilsson configurations are proposed for the low-lying excited states of P-38,P-39,P-40,P-41 from an analysis of the E2 transition matrix elements and moments calculated within the shell model.