| 恒星内部电荷屏蔽对电子俘获反应的影响 |
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| 引用本文： | 罗志全,彭秋和,戴子高.恒星内部电荷屏蔽对电子俘获反应的影响[J].天文学报,1997(1). |
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| 作者姓名： | 罗志全 彭秋和 戴子高 |
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| 作者单位： | 南京大学天文系!南京，210093，南京大学天文系!南京，210093，南京大学天文系!南京，210093 |
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| 基金项目： | 国家自然科学基金，国家“八五”攀登计划的资助 |
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| 摘 要： | 本文分析了在恒星环境下，电荷强屏蔽对原子核电子俘获反应的影响，分析中忽略了电荷屏蔽对核跃迁矩阵元的影响．作为例子，分别讨论了电荷屏蔽对核素33S、30P和57Fe的电子俘获率的影响．结果表明：在较低温度和较高密度下，由于电荷屏蔽，其电子俘获率相对于无屏蔽情形有明显降低，这可能对恒星晚期演化和超新星爆发理论带来明显的影响．
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| 关 键 词： | 电子俘获 电荷屏蔽 恒星演化 |
THE INFLUENCE OF ELECTRON SCREENING ON ELECTRON CAPTURE RATE IN STELLAR INTERIOR |
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| Luo Zhi-quan, Peng Qiu-he, Dai Zi-gao.THE INFLUENCE OF ELECTRON SCREENING ON ELECTRON CAPTURE RATE IN STELLAR INTERIOR[J].Acta Astronomica Sinica,1997(1). |
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| Authors: | Luo Zhi-quan Peng Qiu-he Dai Zi-gao |
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| Abstract: | The influence of electron screening on the electron capture rate in stellar environment is investigated in mis paper. The effect of the screening on nuclear matrix is assumed to be small enough and can be neglected. The effects of the screening on electron captures by 33S, 30p and 57Fe are discussed separately It is shown that the screening diminishes the capture rate evidently in lower temperetures and higher densities.The screening effects may significantly influence the theory of stellar late stage evolution and supernova bursts. |
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| Keywords: | Electron capture Electron screening Stellar evolution |
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