| 7Be半衰期的精确测量 |
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| 引用本文： | 刘志毅,李成波,王思广,周静,孟秋英,卢绍军,周书华,容超凡,袁大庆.7Be半衰期的精确测量[J].原子核物理评论,2003,20(4):235-238. |
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| 作者姓名： | 刘志毅 李成波 王思广 周静 孟秋英 卢绍军 周书华 容超凡 袁大庆 |
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| 作者单位： | 1 中国原子能科学研究院核物理研究所;北京1024132 中国原子能科学研究院计量测试部; 北京102413; |
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| 基金项目： | 中国原子能科学研究院院长基金资助项目(13HI13-ZSH) |
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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.测得7Be在天然铍中半衰期为53.275(25)d,在天然Au中为53.270(19)d.该结果还表明,在这两种材料中7Be半衰期的相对变化小于0.12%. The half-life of 7Be implanted in natural beryllium and in natural gold has been measured with high precision using two high-purity germanium detectors. T_(1/2)=53.275(25) d in natural beryllium and T_(1/2)=53.270(19) d in natural gold is obtained. Within our experimental precision, the difference in the effect of host media beryllium and gold on the half-life of 7Be isn t observed and an upper limit 0.12% of this effect can be set.
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| 关 键 词： | 电子俘获 衰变率 电子亲合势 γ-谱 |
| 文章编号： | 1007-4627(2003)04-0235-04 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2003年5月15日 |
High Precision Measurement of Half-life of 7Be |
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| LIU Zhi-yi,LI Cheng-bo,WANG Si-guang,ZHOU Jing,MENG Qiu-ying,LU Shao-jun,ZHOU Shu-hua.High Precision Measurement of Half-life of 7Be[J].Nuclear Physics Review,2003,20(4):235-238. |
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| Authors: | LIU Zhi-yi LI Cheng-bo WANG Si-guang ZHOU Jing MENG Qiu-ying LU Shao-jun ZHOU Shu-hua |
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| Institution: | 1 Department of Nuclear Physics; China Institute of Atomic Energy; Beijing 102413; China 2 CNNC Radiation Metrology and Measurement Center; China |
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| Abstract: | The half-life of ~7Be implanted in natural beryllium and in natural gold has been measured with high precision using two high-purity germanium detectors. T_(1/2)=53.275(25) d in natural beryllium and T_(1/2)=53.270(19) d in natural gold is obtained. Within our experimental precision, the difference in the effect of host media beryllium and gold on the half-life of _(7)Be isn't observed and an upper limit 0.12% of this effect can be set. |
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