物理学进展2001，Vol.21Issue(2)：225-236,12.
恒星演化和超新星爆发理论中某些重要问题的核物理问题
SOME IMPORTANT QUESTIONS OF NUCLEAR PHYSICS ON THE THEORYOF BOTH STELLAR EVOLUTION AND SUPERNOVA EXPLOSION
摘要
Abstract
First, we present in § Ⅰ the ignition condition of main nuclear burning during evolution of stars with different mass, the dominant role of electron degeneracy played on the nuclear burning of stars under dense density and the condition of explosive nuclear burning respectively. Next we present the main physical factors which cause the stars to be unstable and to collapse in §Ⅱ. We review some unsolved questions of nuclear physics or solid physics in the theory of type Ia supernova explosion in § Ⅲ. We review in §Ⅳ the serious difficulties in the theory of type Ⅱ (and type Ib) explosion and we also introduce our work of the neutrino delayed explosion mechanism of SNII. We suggested that the strong neutrino flux required in the neutrino delayed explosion mechanism of SNII may be produced by a phase transition of (nuclear matter)-(u,d) quark-(u,d,s) quark during very short time scale (＜1 μsec) in the collapsed core (a new born neutron-proton star). Besides, it may be also transported outwards to the surface of neutrino sphere due to the negative entropy gradient. We discuss in §Ⅴ an electric screening effect on the electron capture process in the dense core of the pre-supernova and its possible effect on mass of the collapsed core of the supernova, which plays a key role of the instantaneous explosion mechanism of supernova.关键词
恒星内部热核演化/超新星/中微子过程/电子俘获过程分类
天文与地球科学引用本文复制引用
彭秋和..恒星演化和超新星爆发理论中某些重要问题的核物理问题[J].物理学进展,2001,21(2):225-236,12.
