Nondestructive determination of the <sup>238</sup>U content in mental uranium sample by using the activation method

Chao WANG; Jun XIAO; Pan WANG; Yingying LI; Ziyue LI; Xiaobing LUO

doi:10.11889/j.0253-3219.2016.hjs.39.080201

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Nondestructive determination of the ²³⁸U content in mental uranium sample by using the activation method

更新时间：2021-05-24

- Nondestructive determination of the ²³⁸U content in mental uranium sample by using the activation method
- NUCLEAR TECHNIQUES Vol. 39, Issue 8, Article number: 080201(2016)
- 作者机构：
  
  1.四川大学原子核科学技术研究所成都 610064
  2.中国工程物理研究院中子物理学重点实验室绵阳 621900
- 作者简介：
- 基金信息：
  
  Supported by Key Laboratory of Neutron Physics, China Academy of Engineering Physics
- DOI：10.11889/j.0253-3219.2016.hjs.39.080201
  CLC： TL99
- Received：22 January 2016，
  
  Revised：01 April 2016，
  
  Published：2016-08
- 稿件说明：
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Chao WANG, Jun XIAO, Pan WANG, et al. Nondestructive determination of the ²³⁸U content in mental uranium sample by using the activation method[J]. Nuclear techniques, 2016, 39(8): 080201
DOI：

Chao WANG, Jun XIAO, Pan WANG, et al. Nondestructive determination of the ²³⁸U content in mental uranium sample by using the activation method[J]. Nuclear techniques, 2016, 39(8): 080201 DOI： 10.11889/j.0253-3219.2016.hjs.39.080201.

摘要

238

U作为一种重要的裂变材料，其含量的准确测定在裂变产额数据测量中具有重要意义。在四川大学2.5 MeV质子静电加速器上，利用T（p

n）

He反应产生的483 keV单能中子照射金属铀样品，对照射后生成放射性核素

239

Np的特征γ射线进行测量，利用已知的

238

U（n

γ）俘获截面数据实现了对

238

U含量的准确测量。对影响测量结果准确性的因素做了细致分析，采用蒙特卡罗方法应用软件MCNPX（Monte Carlo N-ParticleeXtended）对中子的多次散射效应和中子注量衰减效应进行了修正，对γ射线在样品中的自吸收也进行了修正，修正后的实验结果是2.884 2 g金属铀含5.712 8×10

个

238

U原子，实验结果的不确定度是4.1%。

Abstract

Background:

As a kind of important fission material

the accurate quantification of

238

U is of great significance in the measurement of fission yield data.

Purpose:

The aim is to nondestructively measure the content of

238

U by using the activation method.

Methods:

Neutron of 483-keV produced by the reaction of T(p

n)3He induces

238

U occurring radiative capture reaction on the 2.5-MeV electrostatic accelerator of Sichuan University. The atomic number of

238

U in uranium samples is measured by using 278-keV gamma ray of

239

Np on the detector of high purity germanium (HPGe) and the data of capture cross section.

Results:

The deflections which were caused by multiple scattering and self-shielding of the target and sample in the experiment were corrected with MCNPX (Monte Carlo N-Particle eXtended). The result of the experiment is that the atomic number of

238

U in the 2.884 2-g metal uranium is 5.712 8×10

Conclusion:

The uncertainty of the experimental result is 4.1%. We can reduce the effect of multiple scattering effects and self-shielding by decreasing the thickness of the bottom lining

target tube

water layer and cladding material of the sample.

关键词

Keywords

references

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Pan WANG

Jun XIAO

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Key Laboratory of Neutron Physics, China Academy of Engineering Physics

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Nondestructive determination of the 238U content in mental uranium sample by using the activation method

DOI：10.11889/j.0253-3219.2016.hjs.39.080201

摘要

Abstract

关键词

Keywords

references

Nondestructive determination of the ²³⁸U content in mental uranium sample by using the activation method