Nuclear Effects on Bremsstrahlung Neutrino Rates of Astrophysical Interest

Details Nuclear Effects on Bremsstrahlung Neutrino Rates of Astrophysical Interest Nuclear Effects on Bremsstrahlung Neutrino Rates of Astrophysical Interest

2001-10-04

arxiv.org/abs/nucl-th/0110011v1

Phys.Rev. C65 (2002) 028801

Physics

Nuclear Physics

Nuclear Theory

11 pages, no figures, LaTex file. submitted to PRC

Scientific paper

10.1103/PhysRevC.65.028801

We calculate in this work the rates for the neutrino pair production by nucleon-nucleon bremsstrahlung taking into account the full contribution from a nuclear one-pion-exchange potential. It is shown that if the temperatures are low enough ($T \leq 20 MeV$), the integration over the nuclear part can be done for the general case, ranging from the completely degenerate (D) to the non-degenerate (ND) regime. We find that the inclusion of the full nuclear contribution enhances the neutrino pair production by $nn$ and $pp$ bremsstrahlung by a factor of about two in both the D and ND limits when compared with previous calculations. This result may be relevant for the physical conditions of interest in the semitransparent regions near the neutrinosphere in type II supernovae, cooling of neutron stars and other astrophysical situations.

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