The low-lying spectrum of the neutron-rich doubly-odd nucleus ${}_{}{}^{40}{}_{}{}^{}\mathrm{Cl}$ is studied with a shell-model space consisting of all configurations of neutron and proton 0$d_{3/2}$ and 0$f_{7/2}$ orbitals, a space which emphasizes the effects of multiparticle-multihole excitations. The effective interaction among the valence particles was obtained from a systematic fit to the low-lying spectra of nuclei within the model space. The model predictions are compared with other shell-model calculations which emphasize spaces characterized by many orbits but only 0ħω configurations, as well as with the limited available experimental data.

• Received 12 September 1988

DOI:https://doi.org/10.1103/PhysRevC.39.701