| 星系中子辐照量分布函数 |
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| 引用本文： | 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). |
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| 作者姓名： | 刘永利 崔文元 张江 刘护国 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金资助项目(10847119);;河北省自然科学基金资助项目(A2009000251);;河北省教育厅自然科学资助项目(2008127) |
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| 摘 要： | 先引入随时间t变化的星系中子辐照量分布函数gρal(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gρal(t,τ)与AGB星的中子辐照量分布函数ρAGB(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Sρun(τ).
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| 关 键 词： | 星系化学演化 AGB星 核合成 中子辐照量 |
Distributions of Neutron Exposures in the Galaxy |
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| 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). |
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| Authors: | LIU Yong-li CUI Wen-yuan ZHANG Jiang LIU Hu-guo |
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| Institution: | 1.Primary Education College;Xingtai University;Xingtai 054001;China;2.Department of Physics;Hebei Normal University;Shijiazhuang 050016;China |
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| 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). |
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| Keywords: | chemical evolution of galaxy AGB stars nucleosynthesis neutron exposure |
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