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1. 中国原子能科学研究院
2. 中国原子能科学研究院,北京,102413
Published:01 September 2003
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[1]李广生,彭朝华,李大明,陈细林,杨毅,鲍杰,杨志红,张生栋,崔安智.~(155)Eu衰变γ射线发射几率的精确测量[J].核技术,2003(09):683-685.
LI Guangsheng PENG Zhaohua LI Darning CHEN Xilin YANG Yi BAO Jie YANG Zhihong ZHANG Shengdong CUI Anzhi. Precise measurements of emission probabilities for y-rays from Eu decay[J]. Nuclear techniques, 2003, (9): 683-685.
[1]李广生,彭朝华,李大明,陈细林,杨毅,鲍杰,杨志红,张生栋,崔安智.~(155)Eu衰变γ射线发射几率的精确测量[J].核技术,2003(09):683-685. DOI:
LI Guangsheng PENG Zhaohua LI Darning CHEN Xilin YANG Yi BAO Jie YANG Zhihong ZHANG Shengdong CUI Anzhi. Precise measurements of emission probabilities for y-rays from Eu decay[J]. Nuclear techniques, 2003, (9): 683-685. DOI:
经堆中子辐照过的
154
Sm样品
用阳离子交换法分离纯化
得到
155
Eu核素。用4πβ-γ符合法测量放射性活度和用小平面Ge探测器测量
155
Eu衰变发射的γ光子数
精确测定了γ射线的发射几率。对于强γ射线和弱γ射线的不确定度分别为1.7%和4.5%。与文献报道值相比较
本测量结果明显改善。
Nuclide 155Eu was separated and purified from the 154Sm sample irradiated by the reactor neutrons by using the cation exchange technique. Activities were measured by the 4πβ-γcoincidence method and the γ-ray spectra of 155Eu decay were measured with a small-area planar Ge detector. Emission probabilities of the y-rays were precisely determined
with uncertainties of 1.7% and 4.5% for the strong and weaker y-rays
respectively. The present results have been considerably improved in comparison with previously reported values.
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