s-过程核合成参数化研究与铅星产生的物理条件  

Slow Neutron-capture Progress Nucleosynthesis Parametric Method and Physical Condition under Which Pb Stars Form

作　　者：刘永利[1] 刘清华[1] 周贵德[2] 

机构地区：[1]邢台学院物理系,河北邢台054001 [2]沧州师范专科学校物理系,河北沧州061001

出　　处：《河北师范大学学报（自然科学版）》2006年第3期305-309,共5页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金资助项目(19973002)

摘　　要：介绍了重元素核合成理论和一些最新的AGB星核合成模型,利用参数化方法计算了AGB星核合成的产量,得到了不同中子数密度(初始金属丰度)、脉冲周期、重叠因子下[Pb/Ce]的数值,在此基础上讨论了铅星产生的物理条件,进而解释了已观测到的各金属丰度下AGB星Pb丰度离散的问题.The theory of nucleosynthesis of heavy element and some new model of AGB nucleosynthesis are introduced. By using the parametric method the production of AGB nucleosynthesis is computed, the value of [Pb/Ce] at the different neutron density （the different initial metallicity）,different pulse period and different overlap is drawn. Basing on the computation, the physical condition under which the Pb stars form is discussed and the scatter of the abundance of [Pb/Ce] at the different metallicity is interpreted.

关 键 词：AGB星 核合成 参数化方法 铅星 

分 类 号：P142[天文地球—天体物理]