Ion-Ion Correlation Effect on the Neutrino-Nucleus Scattering in Supernova Cores

Abstract

We calculate the ion-ion correlation effect on the neutrino-nucleus scattering in supernova cores, which is an important opacity source for the neutrinos and plays a vital role in the supernova explosion. In order to calculate the ion-ion correlation effect we use the results of the improved hypernetted-chain method calculations of the classical one-component plasma. As in the preceding studies on this effect, we find a dramatic decrease of the effective neutrino-nucleus scattering cross section for relatively low energy neutrinos with E < 20MeV. As a matter of fact, our calculation shows a much more dramatic reduction of the effective neutrino-nucleus scattering cross section for the low energy neutrinos with E < 10MeV than the results of Horowitz. Therefore, the ion-ion correlation effect will be more important than has hitherto been recognized. We present an accurate analytic fitting formula that summarizes our numerical results. This fitting formula will facilitate the application of the present results to the supernova explosion simulations.

arXiv comment10 pages, 2 figures, 1 subroutine, published in ApJ 611, 1041-1044 (2004)

References in corpus (3)

• Neutrino Trapping in a Supernova and Ion Screening
• Screening Corrections to the Electron Capture Rates in Dense Stars by the Relativistically Degenerate Electron Liquid
• Enhancement of Resonant Thermonuclear Reaction Rates in Extremely Dense Stellar Plasmas

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• Nuclear pasta in hot dense matter and its implications for neutrino scattering
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• Neutrino Scattering in Heterogeneous Supernova Plasmas
• Effects of ion and electron correlations on neutrino scattering in the infall phase of a supernova