星系中子辐照量分布函数

doi:10.3969/j.issn.1000-1565.2010.02.009

河北大学学报(自然科学版) ›› 2010, Vol. 30 ›› Issue (2): 146-151.DOI: 10.3969/j.issn.1000-1565.2010.02.009

星系中子辐照量分布函数

刘永利¹,崔文元²,张江²,刘护国²

1.邢台学院,初等教育学院,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

出版日期:2010-03-25 发布日期:2010-03-25
基金资助:
国家自然科学基金，河北省自然科学基金，河北省教育厅自然科学基金

Distributions of Neutron Exposures in the Galaxy

LIU Yong-li¹,CUI Wen-yuan²,ZHANG Jiang²,LIU Hu-guo²

Online:2010-03-25 Published:2010-03-25

摘要/Abstract

摘要： 先引入随时间t变化的星系中子辐照量分布函数ρ_(gal)(t,τ)描述各演化阶段星系s-过程核素丰度的分布规律.利用星系化学演化的三成分模型导出星系中子辐照量分布函数的演化方程,从而建立星系的中子辐照量分布函数ρ_(gal)(t,τ)与AGB星的中子辐照量分布函数ρ_(AGB)(τ)之间的关系.取AGB星中子辐照量为指数分布,当取t=t_⊙时,得到了太阳系的中子辐照量分布ρ_(Sun)(τ).

关键词: 星系化学演化, AGB星, 核合成, 中子辐照量

Abstract: The author introduce a new concept, the distribution function of neutron exposures in the Galaxy ρ_(gal)(t,τ), to study the chemical evolution characteristics of the Galaxy for s-process nuclei. Using the three component model for the chemical evolution of the Galaxy, we get the evolution functions of ρ_(gal)(t,τ) which include the distribution function of neutron exposures in the AGB stars ρ_(AGB)(τ)·At t=t_⊙, we adopt the ρ_(AGB)(τ) as exponential distribution and obtain the distribution function of neutron exposures in the solar system ρ_(Sun)(τ).

Key words: chemical evolution of galaxy, AGB stars, nucleosynthesis, neutron exposure

中图分类号:

P142

刘永利,崔文元,张江,刘护国. 星系中子辐照量分布函数[J]. 河北大学学报(自然科学版), 2010, 30(2): 146-151.

LIU Yong-li,CUI Wen-yuan,ZHANG Jiang,LIU Hu-guo. Distributions of Neutron Exposures in the Galaxy[J]. Journal of Hebei University (Natural Science Edition), 2010, 30(2): 146-151.

参考文献

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星系中子辐照量分布函数

Distributions of Neutron Exposures in the Galaxy

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