Nuclei in Neutrino-Degenerate Dense Matter. II : Hot Case

概要

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The properties of nuclei in hot and dense matter with degenerate neutrino are carefully investigated. The ordinary Wigner-Seitz cell approximation is adopted to define the nucleus in such an extraordinary matter, and the finite temperature Thomas-Fermi model of nuclei is used to treat the nucleus in a cell. In comparison with the shape of nuclei obtained with three different nuclear forces, it is found that the shape does not depend sensitively on the functional form of the nuclear forces. For the neutrino degenerate hot and dense matter, the nuclei become very large (proton number 400, and mass number 1200, at the matter density of 10^<14> g cm^<-3>) due to the cancellation of the Coulomb energy, and they begin to merge at 10^<13.7> g cm^<-3> for Y_L=0.3 matter. These large nuclei still exist in the region of rather high temperature (〜6 MeV), and cause the neutrino trapping in the collapsing core when the density becomes greater than 10^<12> g cm^<-3>.
理論物理学刊行会の論文
1983-12-25