Variance analysis for passive neutron multiplicity counting

Passive neutron multiplicity counting is widely used as a nondestructive assay technique to quantify mass of plutonium material. One goal of this technique is to achieve good precision in a short measurement time. In this paper, we describe a procedure to derive mass assay variance for multiplicity...

Full description

Saved in:
Bibliographic Details
Published in:核技术（英文版） 2015-04, Vol.26 (2), p.54-58
Main Author: 陈利高 龚建 王侃 谢奇林 刘晓波 白忠雄 鲁艺 荣茹 尹延朋
Format: Article
Language:English
Subjects:
中子
多重数分布
方差分析
无源
测定技术
测量时间
计数
质量测定
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Passive neutron multiplicity counting is widely used as a nondestructive assay technique to quantify mass of plutonium material. One goal of this technique is to achieve good precision in a short measurement time. In this paper, we describe a procedure to derive mass assay variance for multiplicity counting based on the threeparameter model, and analytical equations are established using the measured neutron multiplicity distribution.Monte Carlo simulations are performed to evaluate precision versus plutonium mass under a fixed measurement time with the equations. Experimental data of seven weapons-grade plutonium samples are presented to test the expected performance. This variance analysis has been used for the counter design and optimal gate-width setting at Institute of Nuclear Physics and Chemistry.
ISSN:1001-8042
2210-3147
DOI:10.13538/j.1001-8042/nst.26.020402