In-beam \nγ\n-ray spectroscopy of \nP37–42

Abstract

The level schemes of the neutron-rich P 37 – 42 isotopes are investigated via in-beam γ -ray spectroscopy following the fragmentation of a Cl 45 projectile beam at intermediate beam energies. Information on γ γ coincidence relationships complemented by comparisons to shell-model calculations in the s d - p f model space were used to construct excitation level schemes for these neutron-rich nuclei. For the odd-mass P 37 , 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 , 39 , 40 , 41 from an analysis of the E 2 transition matrix elements and moments calculated within the shell model.