Contributions from high-momentum intermediate states to effective nucleon-nucleon interactions

H. M. Sommermann, H. Müther, K. C. Tam, T. T. S. Kuo, and Amand Faessler
Phys. Rev. C 23, 1765 – Published 1 April 1981
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Abstract

We reexamine the intermediate state convergence problem for the core polarization diagram (G3p1h) in the expansion of an effective shell-model interaction using a modern meson exchange Bonn-Jülich potential in comparison to the phenomenological Reid soft-core interaction. The Bonn-Jülich NN potential contains a much weaker tensor force as compared with the Reid soft-core interaction. As a consequence its repulsive contributions to G3p1h from high momentum intermediate particle states are much reduced and G3p1h can be calculated in a good approximation with 2ω particle-hole excitations alone. This opens up the possibility of calculating higher order processes in a reliable and expendient way. We have further determined the spectra of O18 and F18 using the folded diagram perturbation theory to determine the effective interaction. The energy levels are best reproduced by the Bonn-Jülich NN potential.

NUCLEAR STRUCTURE O18, F18; dependence of effective interaction on NN tensor force. Convergence of intermediate state summation in core polarization.

  • Received 22 September 1980

DOI:https://doi.org/10.1103/PhysRevC.23.1765

©1981 American Physical Society

Authors & Affiliations

H. M. Sommermann*, H. Müther, K. C. Tam, T. T. S. Kuo, and Amand Faessler

  • Institut für Theoretische Physik, Universität Tübingen, D-7400 Tübingen, Germany

  • *On leave from the State University of New York at Albany.
  • On leave from the State University of New York at Stony Brook.

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Vol. 23, Iss. 4 — April 1981

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