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Study on γ-ray self-absorption correction in plutonium production rates experiment
- NUCLEAR TECHNIQUES Vol. 42, Issue 10, (2019)
- 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：
HAN Zijie, male, born in 1978, graduated from Sichuan University with a master's degree in 2008, focusing on the research of nuclear radiation measurement technology
- 基金信息：National Natural Science Foundation of China(11775200;11575165);National Research Projects on the Development of Magnetic Confined Fusion Energy(2015GB108006)
DOI：10.11889/j.0253-3219.2019.hjs.42.100502
CLC： TL99，O571.32Received：19 March 2019，
Revised：17 July 2019，
Published：13 October 2019
- 稿件说明：
移动端阅览
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
2
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
2
This study aims to correct the γ-ray self-absorption effect of the activation foils in the plutonium production rates experiment.
Methods
2
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
2
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
2
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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