Isovector spin-longitudinal and -transverse response of nuclei

Phys. Rev. C 49, 789 – Published 1 February 1994
V. R. Pandharipande, J. Carlson, Steven C. Pieper, R. B. Wiringa, and R. Schiavilla

Abstract

The sum and energy-weighted sum of isovector spin-longitudinal and -transverse response of H2, He4, O16, and nuclear matter are studied with realistic models of nuclear forces. The results for O16 are compared with those obtained using effective interactions and the random-phase approximation. The responses of H2 are also calculated. We confirm the earlier predictions that nuclear forces enhance the isovector spin-longitudinal response over the spin-transverse. However, we find that they also push the strength of both these responses to higher energies. Indications of the predicted enhancement have not been observed in p→,n→ experiments on C12 and Ca40 recently carried out at Los Alamos. We find that conventional nuclear theory predicts a measurable enhancement in H2 and a significant enhancement in He4. Since many properties of these few-body nuclei are well explained with realistic nuclear forces an experimental verification of the enhancement, or its absence, in H2 and He4 will be very interesting.

DOI: http://dx.doi.org/10.1103/PhysRevC.49.789

  • Received 11 October 1993
  • Published in the issue dated February 1994

© 1994 The American Physical Society

Authors & Affiliations

V. R. Pandharipande

  • Physics Department, University of Illinois, Urbana Campus, 1110 West Green Street, Urbana, Illinois 61801

J. Carlson

  • Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Steven C. Pieper and R. B. Wiringa

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

R. Schiavilla

  • Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Via Arnesano, 73100 Lecce, Italy

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