Effective interactions for the 0p1s0d nuclear shell-model space

E. K. Warburton and B. A. Brown
Phys. Rev. C 46, 923 – Published 1 September 1992
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Abstract

Shell-model interactions are constructed in the cross-shell model space connecting the 0p and 1s0d shells with due regard for the perturbative effects of the neighboring 0s and 0f1p shells. The interactions have three distinctive 0p-shell, cross-shell, and 1s0d-shell parts. The latter is taken to be the previously determined W interaction. The 0p-shell interaction is represented by two-body matrix elements and the cross-shell by either a potential or by two-body matrix elements. The interactions are determined by least-squares fits to 51 0p-shell and 165 cross-shell binding energies. It is found that the addition of monopole terms to a potential that is otherwise similar to that of the Millener-Kurath interaction results in a great improvement in the fit. In the fit to two-body matrix elements, 45 of 97 possible linear combinations of parameters are varied and the root-mean-square deviation for the 165 cross-shell energies is 330 keV. Examples of the application of the interactions are given for the prediction of neutron-rich binding energies, Gamow-Teller decays, and 0ħω, 1ħω, and 2ħω energy spectra.

  • Received 17 April 1992

DOI:https://doi.org/10.1103/PhysRevC.46.923

©1992 American Physical Society

Authors & Affiliations

E. K. Warburton

  • Brookhaven National Laboratory, Upton, New York 11973

B. A. Brown

  • National Superconducting Cyclotron Laboratory and Department of Physics Astronomy, East Lansing, Michigan 48824

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Vol. 46, Iss. 3 — September 1992

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