一种基于103Rh (n, n')103Rhm反应的快中子注量监测方法

李达; 陈达; 江新标; 祁铁涛; 于青玉; 余小任; 张继红; 张文首

doi:10.11889/j.0253-3219.2017.hjs.40.010203

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一种基于¹⁰³Rh (n, n')¹⁰³Rh^m反应的快中子注量监测方法

低能加速器技术、射线技术及应用 | 更新时间：2021-05-19

- 一种基于¹⁰³Rh (n, n')¹⁰³Rh^m反应的快中子注量监测方法
- A fast neutron fluence monitor method based on ¹⁰³Rh (n, n')¹⁰³Rh^m reaction
- 核技术 2017年40卷第1期文章编号：010203
- 作者机构：
  
  1.西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室西安 710024
  2.南京航空航天大学核科学与工程系南京 210016
- 作者简介：
  
  [ "李达, 男, 1982年出生, 2007年于西北核技术研究所获硕士学位, 现为博士研究生, 主要从事反应堆辐射测量研究" ]
- 基金信息：
  
  国家自然科学基金青年科学基金(No.1130527);强脉冲辐射环境模拟与效应国家重点实验室基础研究基金资助(No.SKLIPR1216)
- DOI：10.11889/j.0253-3219.2017.hjs.40.010203
  中图分类号： TL375.4
- 收稿日期：2016-07-27，
  
  修回日期：2016-11-20，
  
  纸质出版日期：2017-01
- 稿件说明：
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李达, 陈达, 江新标, 等. 一种基于¹⁰³Rh (n, n')¹⁰³Rh^m反应的快中子注量监测方法[J]. 核技术, 2017,40(1):010203

Da LI, Da CHEN, Xinbiao JIANG, et al. A fast neutron fluence monitor method based on ¹⁰³Rh (n, n')¹⁰³Rh^m reaction[J]. Nuclear techniques, 2017, 40(1): 010203
李达, 陈达, 江新标, 等. 一种基于¹⁰³Rh (n, n')¹⁰³Rh^m反应的快中子注量监测方法[J]. 核技术, 2017,40(1):010203 DOI： 10.11889/j.0253-3219.2017.hjs.40.010203.

Da LI, Da CHEN, Xinbiao JIANG, et al. A fast neutron fluence monitor method based on ¹⁰³Rh (n, n')¹⁰³Rh^m reaction[J]. Nuclear techniques, 2017, 40(1): 010203 DOI： 10.11889/j.0253-3219.2017.hjs.40.010203.

摘要

给出了一种基于

103

Rh（n，n'）

103

反应监测快中子注量的方法。根据干扰核素半衰期不同的特点，选取合适的冷却和测量时间，降低了

103

Rh（n，n'）

103

活化率测量中干扰核素的影响。根据

152

Eu标定实验结果，利用遗传算法优化探测器尺寸，建立探测器蒙特卡罗算法模型。利用模型校正

Mo-

放射源实验效率，解决了探测器效率标定和射线自吸收问题。开展了快中子注量监测，实验结果与铁、硫、镍等快中子监测箔一致性较好，测量不确定度约为13.1%。

Abstract

Background:

Accurate neutron energy spectra and neutron flux parameters are needed to provide the neutron beam service for the reactor users.

Purpose:

The aim is to accurately measure the fast neutron fluence in Xi'an pulsed reactor.

Methods:

A neutron fluence monitor method based on

103

Rh (n

n')

103

reaction was presented. According to the difference of half-life of interference nuclides

cool-down time and measuring time are properly selected to reduce impacts of interference nuclides during the

103

Rh (n

n')

103

activation rate measurements. On the basis of

152

Eu calibration experiment results

the Monte Carlo model of detector was established with optimized detector size by genetic algorithm

the problem of detector efficiency calibration and ray self-absorption was solved.

Results:

A fast neutron fluence monitor experiment based on this method has been performed

the result of which was consistent with Fe

and Ni. The uncertainty of measurement is 13.1%.

Conclusion:

The establishment of this method successfully solved the problem of fast neutron fluence monitoring in Xi'an pulsed reactor.

关键词

Keywords

references

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