Nuclear symmetry energy

Details Nuclear symmetry energy Nuclear symmetry energy

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvc..57.3488l&link_type=abstract

Physical Review C (Nuclear Physics), Volume 57, Issue 6, June 1998, pp.3488-3491

Physics

Nuclear Physics

57

Nuclear Matter, Forces In Hadronic Systems And Effective Interactions, Nuclear Structure Models And Methods, Nuclear Matter Aspects Of Neutron Stars

Scientific paper

To study the nuclear symmetry energy, we extend the Dirac-Brueckner approach with a Bonn one-boson-exchange nucleon-nucleon interaction to the general case of asymmetric nuclear matter. We extract the symmetry energy coefficient at the saturation to be about 31 MeV, which is in good agreement with the empirical value of 30+/-4 MeV. The symmetry energy is found to increase almost linearly with the density, which differs considerably from the results of nonrelativistic approaches. This finding also supports the linear parametrization of Prakash, Ainsworth, and Lattimer. We find, furthermore, that the higher-order dependence of the nuclear equation of state on the asymmetry parameter is unimportant.

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