Shell-model studies of negative-parity states in nuclei with A=18, 19 and 20
- 1 February 1982
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear Physics
- Vol. 8 (2) , 245-255
- https://doi.org/10.1088/0305-4616/8/2/011
Abstract
A shell-model calculation of the negative-parity states in the A=18, 19 and 20 nuclei is presented. Assuming the nucleus 16O to be the core, an active hole is restricted to the 1p1/2 or 1p3/2 orbits, and active particles are allowed to occupy the 1d5/2 and 2s1/2 orbits. The two-body effective interaction is assumed to be a central potential which has Yukawa radial dependence. The energy spectra are calculated from a least-squares fit to the experimental data, varying the strengths of the exchange interaction and the single-particle level splittings. Spectroscopic factors and E2, E3 and M1 transition rates are calculated and compared with the observed values.Keywords
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