造钚率实验中γ射线自吸收修正研究

韩子杰; 朱通华; 鹿心鑫; 安力

doi:10.11889/j.0253-3219.2019.hjs.42.100502

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造钚率实验中γ射线自吸收修正研究

核物理、交叉学科研究 | 更新时间：2024-10-25

- 造钚率实验中γ射线自吸收修正研究
- Study on γ-ray self-absorption correction in plutonium production rates experiment
- 核技术 2019年42卷第10期
- 作者机构：
  
  中国工程物理研究院核物理与化学研究所　绵阳 621900
- 作者简介：
  
  韩子杰，男，1978年出生，2008年于四川大学获硕士学位，主要从事核辐射测量技术研究
- 基金信息：
  
  国家自然科学基金(11775200;11575165);国家磁约束核聚变能发展研究专项(2015GB108006)
- DOI：10.11889/j.0253-3219.2019.hjs.42.100502
  中图分类号： TL99，O571.32
- 收稿日期：2019-03-19，
  
  修回日期：2019-07-17，
  
  纸质出版日期：2019-10-13
- 稿件说明：
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韩子杰,朱通华,鹿心鑫等.造钚率实验中γ射线自吸收修正研究[J].核技术,2019,42(10):65-69.

HAN Zijie,ZHU Tonghua,LU Xinxin,et al.Study on γ-ray self-absorption correction in plutonium production rates experiment[J].NUCLEAR TECHNIQUES,2019,42(10):65-69.
韩子杰,朱通华,鹿心鑫等.造钚率实验中γ射线自吸收修正研究[J].核技术,2019,42(10):65-69. DOI： 10.11889/j.0253-3219.2019.hjs.42.100502.

HAN Zijie,ZHU Tonghua,LU Xinxin,et al.Study on γ-ray self-absorption correction in plutonium production rates experiment[J].NUCLEAR TECHNIQUES,2019,42(10):65-69. DOI： 10.11889/j.0253-3219.2019.hjs.42.100502.

摘要

造钚率实验研究中需要测量贫化铀活化片发射的277.6 keV γ射线，活化片对此γ射线具有一定自吸收作用，需要对其进行修正。用面源法和体源法开展了自吸收理论的蒙德卡罗模拟计算，结果显示：探测距离为9 cm时，两种方法的偏差小于1.3%。用

243

Am面源、贫化铀活化片和HPGe探测器开展了277.6 keV γ射线自吸收实验研究，得到了不同厚度贫化铀活化片对277.6 keV γ射线自吸因子，实验结果与理论模拟偏差小于2.5%。

Abstract

Background

γ-ray of 277.6 keV needs to be measured in plutonium production pates experiment. Self-absorption effect of depleted uranium activated foils will affect the accuracy of the measuring results.

Purpose

This study aims to correct the γ-ray self-absorption effect of the activation foils in the plutonium production rates experiment.

Methods

First of all

plane source method and substance method were applied to MCNP (Monte Carlo N Particle Transport Code) to simulate the self-absorption theory

and results at various detection distance were obtained. Then experiments using 243Am plane radioactive source

depleted uranium foils and the HPGe detector were carried out to obtain self-absorption factors of 277.6 keV gamma-ray for depleted uranium activated foils with different thickness.

Results

The deviation of these two methods for simulation calculation of self-absorption factor is less than 1.3% at detection distance of 9 cm. The deviation between experimental measurement and simulation computation is less than 2.5% for depleted uranium foils with different thickness.

Conclusion

The reliability of theoretical simulation is proved by the verification between experiment and theory in this study. Hence the self-absorption correction factors of samples under different measurement models can be obtained by theoretical simulation in the plutonium production rates experiment.

关键词

Keywords

references

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