Effective decay rates of nuclei in astrophysical environments

【摘要】 Nuclear β-decay plays a pivotal role at various stages of stellar evolution.However,the effective decay rates of nuclei in astrophysical environments may differ significantly from their laboratory values.This paper presents a detailed methodology for calculating nuclear half-life under the influence of temperature,electron density,ionization,and incomplete thermal equilibrium.We analyze the impact of astrophysical conditions on the β-decay of ²⁶Al,⁵⁹Fe,⁷⁹Se,and ²⁰⁵Pb,revealing substantial variations in their effective half-lives within stellar environments.These changes lead to significant differences in nucleosynthetic yields,underscoring the critical importance of accounting for environmental effects when modeling nuclear decay rates.更多还原

【Abstract】 Nuclear β-decay plays a pivotal role at various stages of stellar evolution.However,the effective decay rates of nuclei in astrophysical environments may differ significantly from their laboratory values.This paper presents a detailed methodology for calculating nuclear half-life under the influence of temperature,electron density,ionization,and incomplete thermal equilibrium.We analyze the impact of astrophysical conditions on the β-decay of ²⁶Al,⁵⁹Fe,⁷⁹Se,and ²⁰⁵Pb,revealing substantial variations in their effective half-lives within stellar environments.These changes lead to significant differences in nucleosynthetic yields,underscoring the critical importance of accounting for environmental effects when modeling nuclear decay rates.更多还原