| 252Cf 随机脉冲源法测量深次临界瞬发中子衰减常数 |
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| 引用本文： | 宋凌莉,周浩军,金宇,李建胜,张翼,李春远.252Cf 随机脉冲源法测量深次临界瞬发中子衰减常数[J].原子能科学技术,2006,40(6):714-717. |
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| 作者姓名： | 宋凌莉 周浩军 金宇 李建胜 张翼 李春远 |
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| 作者单位： | 中国工程物理研究院核物理与化学研究所,四川 绵阳 621900 |
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| 摘 要： | 运用252Cf 随机脉冲源法时幅变换(TAC)方式测量系统,实验获得高浓缩铀椭球壳核系统的瞬发中子衰减常数α。采用单指数和双指数最小二乘法拟合，α值均为100μs-1。用蒙特卡罗方法模拟实验过程，α计算值为110μs-1。结果表明，该系统对深次临界α的测量是有效的。
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| 关 键 词： | 252Cf" target="_blank">252Cf')">252Cf 次临界 瞬发中子衰减常数 |
| 文章编号： | 1000-6931（2006）06-0714-04 |
| 收稿时间： | 2005-04-12 |
| 修稿时间： | 2005-04-122005-08-30 |
Measurement of Prompt Neutron Decay Constant for Deep Subcritical Assembly Using 252Cf as Randomly Pulsed Neutron Source |
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| SONG Ling-li,ZHOU Hao-jun,JIN Yu,LI Jian-sheng,ZHANG Yi,LI Chun-yuan.Measurement of Prompt Neutron Decay Constant for Deep Subcritical Assembly Using 252Cf as Randomly Pulsed Neutron Source[J].Atomic Energy Science and Technology,2006,40(6):714-717. |
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| Authors: | SONG Ling-li ZHOU Hao-jun JIN Yu LI Jian-sheng ZHANG Yi LI Chun-yuan |
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| Affiliation: | China Academy of Engineering physics, P.O.Box 919-210, Mianyang 621900,China |
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| Abstract: | Experiments were performed for determing prompt neutron decay constant α of highly enriched uranium spherical shell by randomly pulsed neutron nethod with a 252Cf source. α values from both least squares analysis of single exponential and two exponential fittings are in agreement and it is 100μs-1. α value calculated of 110μs-1 is also obtained by Monte-Carlo method. It is proved that the time-to-amplitude converter measuring system is effective for α determination of deep subcritical assemblies. |
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| Keywords: | ~(252)Cf subcriticality prompt neutron decay constant |
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