A Monte Carlo simulation and setup optimization of output ef f iciency to PGNAA thermal neutron using 252Cf neutrons

被引：0

作者：

张金钊 ^{[1
]}

庹先国 ^{[1
]}

机构：

[1] Applied Nuclear Techniques in Geoscience Key Laboratory, Chengdu University of Technology

来源：

Chinese Physics C | 2014年 / 38卷 / 07期

基金：

中国国家自然科学基金;

关键词：

PGNAA; neutron source; thermal neutron; moderation; reflection;

D O I：

暂无

中图分类号：

O571.5 [中子物理];

学科分类号：

0827 ; 082701 ;

摘要：

We present the design and optimization of a prompt γ-ray neutron activation analysis(PGNAA) thermal neutron output setup based on Monte Carlo simulations using MCNP5 computer code. In these simulations, the moderator materials, reflective materials, and structure of the PGNAA252 Cf neutrons of thermal neutron output setup are optimized. The simulation results reveal that the thin layer paraffin and the thick layer of heavy water moderating effect work best for the252 Cf neutron spectrum. Our new design shows a significantly improved performance of the thermal neutron flux and flux rate, that are increased by 3.02 times and 3.27 times, respectively,compared with the conventional neutron source design.

引用

页码：145 / 149

页数：5

共 8 条

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