| AGB星s-过程核合成:铁种子核受中子照射的概率 |
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| 引用本文： | 张凤华,张波. AGB星s-过程核合成:铁种子核受中子照射的概率[J]. 河北师范大学学报(自然科学版), 2007, 31(2): 184-187 |
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| 作者姓名： | 张凤华 张波 |
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| 作者单位： | 沧州师范专科学校,物理系,河北,沧州,061001;河北师范大学,物理科学与信息工程学院,河北,石家庄,050016;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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| 摘 要： | 根据3种典型的AGB星s-过程核合成模型的中子辐照量分布,讨论了各恒星模型氦壳层区域内受中子照射的铁种子核数目比率(或铁种子核受中子照射的概率).该值在一定程度上反映了s-过程核合成模型的特点.结果表明,所有概率都随重叠因子r单调增加,r=1时,存在极限值1.在辐射s-过程核合成模型的情形,概率对13C壳层占氦壳层的质量比例q的变化很敏感.
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| 关 键 词： | AGB星 s-过程核合成 中子辐照量分布 |
| 文章编号： | 1000-5854(2007)02-0184-04 |
| 修稿时间： | 2006-07-07 |
s-process Nucleosynthesis in AGB Star:the Probability of a Fe Seed Nucleus Experiencing Neutron Irradiation |
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| ZHANG Feng-hua,ZHANG Bo. s-process Nucleosynthesis in AGB Star:the Probability of a Fe Seed Nucleus Experiencing Neutron Irradiation[J]. Journal of Hebei Normal University, 2007, 31(2): 184-187 |
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| Authors: | ZHANG Feng-hua ZHANG Bo |
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| Affiliation: | 1.Department of Physies,Cangzhou Teachers College,Hebei Cangzhou 061001 ,China; 2.College of Physics Science and Information Engineering,Hebei Normal University,Hebei Shijiazhuang 050016,China |
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| Abstract: | Based on the distribution of neutron exposures for three typical AGB(Asymptotic Giant Branch) star models of s-process nucleosynthesis,the fraction of Fe seed nuclei that suffer neutron irradiation in the He intershell,or in other words,the probability that a Fe seed nucleus experiences neutron irradiation is discussed.It reflects,in a way,the characteristics of the s-process model.The results show that all the probabilities increase monotonously with the overlap factor r,and there exists a limiting value 1 when r=1.In the case of radiative s-process nucleosynthesis model,the probability is sensitive to the change of parameter q,the mass fraction of 13C pocket in the He intershell. |
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| Keywords: | AGB stars distribution of neutron exposures probability |
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