3M_⊙AGB星重元素丰度的再研究

The Reanalyze of the Heavy-element Abundances of the 3M_⊙ AGB Stars

以13C（a，n）16O和22Ne（a，n）25Mg为中子源，对3M⊙低质量热脉冲AGB星，采用无分叉S－过程反应通道及较新的中子俘获截面，结合1997年给出的最新恒星演化计算结果，在平均中子辐照量τ0的合理取值范围内，计算了重元素丰度和碳氧比的演化，并给出理论计算结果与观测值的比较．

Based on the nuclear reaction 13C (a, n ) 16O and 22Ne (a, n )'Mg, the unbranch s -- process path and the latest neutron capture sections,combined the latest results of stellar evolutions and the reasonable range of mean neutron capture To,the heavyelement abundances and C/O of low -- mass AGB stars with 3Ma are calculated,and thetheoretical results are compared with the observed.