| 在Be和Au中7Be半衰期差别的测量 |
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| 引用本文： | 李成波,刘志毅,王思广,周静,孟秋英,周书华.在Be和Au中7Be半衰期差别的测量[J].原子能科学技术,2005,39(5):390-394. |
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| 作者姓名： | 李成波 刘志毅 王思广 周静 孟秋英 周书华 |
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| 作者单位： | 中国原子能科学研究院核物理研究所,北京,102413 |
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| 基金项目： | 国家自然科学基金资助项目(10305020) |
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| 摘 要： | 用两套γ谱仪精确测量了注入到天然铍和天然金中的7Be发生电子俘获的半衰期。实验测得,天然铍中7Be的半衰期为53.275(25)d,在天然金中为53.270(19)d。在0.12%的实验测量精度下,未观测到7Be半衰期在这两种材料中的差异。结果表明:注入在不同材料中7Be半衰期的变化不能仅从被注入材料的电子亲合势的差异考虑,还要考虑材料晶格结构的影响。
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| 关 键 词： | 电子俘获 半衰期 电子亲合势 晶格结构 |
| 文章编号： | 1000-6931（2005）05-0390-05 |
| 收稿时间： | 2004-02-11 |
| 修稿时间： | 2004-02-112004-06-30 |
Measurement of Difference of Half-Life of 7Be in Be and Au |
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| LI Cheng-bo,LIU Zhi-yi,WANG Si-guang,ZHOU Jing,MENG Qiu-ying,ZHOU Shu-hua.Measurement of Difference of Half-Life of 7Be in Be and Au[J].Atomic Energy Science and Technology,2005,39(5):390-394. |
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| Authors: | LI Cheng-bo LIU Zhi-yi WANG Si-guang ZHOU Jing MENG Qiu-ying ZHOU Shu-hua |
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| Affiliation: | China Institute of Atomic Energy, Beijing 102413, China |
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| Abstract: | The half-life T_(1/2) of ~7Be implanted in natural beryllium and natural gold has been measured using two coaxial high-purity germanium detectors to be 53.275(25) d and 53.270(19) d,respectively.No difference in the half-life of ~7Be in the host media beryllium and gold is observed within measurement uncertainty of 0.12%.This result implies that the change of the decay rate of ~7Be implanted in different materials can not be simply expected from the electron affinity difference consideration alone and the(lattice) structure of the host materials should be taken into account. |
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| Keywords: | electron capture half-life electron affinity lattice structure |
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