A time correlation coincidence method to measure uranium enrichment

XIE Wenxiong GONG Jian LI Jiansheng HUANG Po ZENG Liheng

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A time correlation coincidence method to measure uranium enrichment

更新时间：2021-03-05

- A time correlation coincidence method to measure uranium enrichment
- NUCLEAR TECHNIQUES Vol. 34, Issue 8, (2011)
- 作者机构：
  
  中国工程物理研究院核物理与化学研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL816
- Published：01 August 2011
- 稿件说明：
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[1]谢文雄,龚建,李建胜,黄坡,曾立恒.时间关联符合法测量铀部件浓缩度[J].核技术,2011,34(08):609-612.

XIE Wenxiong GONG Jian LI Jiansheng HUANG Po ZENG Liheng. A time correlation coincidence method to measure uranium enrichment[J]. Nuclear techniques, 2011, 34(8): 609-612.
[1]谢文雄,龚建,李建胜,黄坡,曾立恒.时间关联符合法测量铀部件浓缩度[J].核技术,2011,34(08):609-612. DOI：

XIE Wenxiong GONG Jian LI Jiansheng HUANG Po ZENG Liheng. A time correlation coincidence method to measure uranium enrichment[J]. Nuclear techniques, 2011, 34(8): 609-612. DOI：

摘要

应用时间关联符合法对探测铀部件浓缩度进行了初步的实验研究

选用252Cf快电离室定时中子源

以及相应的仪器对质量（8 kg左右）与形状（半球壳）相似的高浓铀和贫化铀部件进行探测

获得了源与探测器之间的时间关联符合计数。通过对时间关联符合计数的分析

可以得到相关的标签参数来表征铀部件的浓缩度。这些参数对铀部件的浓缩度具有很高的敏感性

敏感系数达19.4%

能够有效地区分质量与形状相似而浓缩度不同的铀部件

达到核查铀部件的目的。

Abstract

In this paper

we report the experiment based on time correlation coincidence to measure uranium enrichment.With the time tagged by a 252Cf spontaneous fission neutron source

measurements were done on uranium metal castings of similar quantity(about 8 kg) and shape(hemispherical shell) but in different enrichments.The characteristic of time correlation coincidence counts between the source and detector were obtained.By analyzing these counts

many groups of special parameters can be obtained to characterize the fission signal.These parameters are sensitive to changes in uranium enrichment

with a sensitivity coefficient of 19.4%.Therefore

uranium metal castings of different enrichments can be identified for the purpose of nuclear warhead verification.

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