摘要
针对低能反应和共振跃迁,分析了在恒星内部电荷屏蔽对β衰变率的影响．对共振跃迁的分析是基于核的壳层模型．作为例子,详细计算了电荷屏蔽对56Cr的β衰变的影响．结果表明:在较低温度和高密度下,电荷屏蔽使β衰变率有明显的增加。这对恒星晚期演化和超新星爆发研究可能会有重要的影响。
Aiming at the low-energy reaction and Gamow-Teller resonant transition, the influence of electron screening on the β-decay rate in stellar interior is investigated in this paper. As an example, the effect of the screening on β-decay by ^56Cr is calculated. It is shown that the screening increases the β -decay rate evidently in lower temperatures and higher densities. The screening effect may importantly influences the study of stellar late stage evolution and supernova burst.
出处
《天文学进展》
CSCD
北大核心
2006年第4期380-386,共7页
Progress In Astronomy
基金
国家自然科学基金资助项目(10347008)
关键词
天体物理学
β衰变率
电荷屏蔽
核合成
恒星演化
astrophysics
β-decay rate
electron screening
nucleosynthesis
stellar evolution
