太阳系的中子辐照量分布  

Distributions of Neutron Exposures of the Solar System

作　　者：刘永利[1] 崔文元[2] 张伟娟[2] 翟利学[2] 

机构地区：[1]邢台学院物理系,河北邢台054001 [2]河北师范大学物理科学与信息工程学院,河北石家庄050016

出　　处：《河北师范大学学报（自然科学版）》2010年第4期428-433,共6页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(10847119);河北省自然科学基金(A2009000251);河北师范大学自然科学重点资助项目(L2009Z04);河北省高校百名优秀创新人才支撑计划

摘　　要：采用星系化学演化解析模型,结合脉冲AGB星慢中子俘获(s-过程)核合成理论,以AGB星s-过程单辐照解为前提,推导了单辐照情况下太阳系的中子辐照量分布,并将所得结果与利用参数化s-过程模型的计算结果及采用规范多事件s-过程模型的计算结果进行了比较,研究发现,计算结果与文献给出的中子辐照量分布在趋势上是一致的,但量级上有些偏差.这证明了只考虑AGB星的单辐照情况还不足以解释太阳系的中子辐照量分布,还应该考虑中子辐照量指数分布的贡献.Using a chemical evolution analytic model of the Galaxy,an analytical solution about the neutron exposure of the solar system is obtained,in which the s-process material has experienced only a few neutron exposures in the convective He-burning shell of AGB stars.It is found that they are consistent at the trend of these curves,through comparing with Beer＇s result and Goriely＇s result,respectively.But the main and strong components of the analytical solution are lower than these of Beer＇s result and Goriely＇s result.This results from the simple suggestions on the evolution model of the Galaxy and the only one exposure of AGB stars,because there are exponential distribution of exposures for AGB stars.

关 键 词：AGB星 核合成 星系化学演化 中子辐照量 

分 类 号：P142[天文地球—天体物理]