强激光与粒子束2018，Vol.30Issue(1)：148-152,5.DOI:10.11884/HPLPB201830.170246
PGAI瞬发伽玛射线活化成像技术理想化模型的模拟
Prompt gamma activation imaging technology under idealized model
摘要
Abstract
Prompt gamma activation imaging (PGAI) is a new type of element distribution imaging method in a non-destructive way.At present,the PGAI measure platforms which have been completed are all applied under the ideal model,and only for analyzing small pieces of sample by using the neutron source at the reactor.To discuss the accuracy and validate the feasibility of PGAI technology based on cold and thermal neutron,the ideal model of PGAI was analyzed by using Monte Carlo software.A homogeneous sample of 5 cm × 5 cm × 1 cm which consisted of pure iron was measured by adopting collimated neutron beam and the high-purity Ge detector,the dimension of the isovolume was 1 cm× 1 cm× 1 cm.It is shown that two kinds of energy neutrons all has been successfully used in PGAI.But no matter what kind of energy neutrons,when measuring the homogeneous single element sample,the consistency of image reconstruction results can't be guaranteed because of the neutron self-absorption,neutron scattering and γ-ray self-absorption.Therefore we need to analyze the physical mechanism and establish proper correction model in our later work.关键词
瞬发伽马射线成像/蒙特卡罗/图像重建/中子散射/中子自屏Key words
prompt gamma activation imaging/Monte Carlo/reconstruction image/neutron scatter/neutron self-absorption分类
能源科技引用本文复制引用
耿书群,贾文宝,黑大千,程璨..PGAI瞬发伽玛射线活化成像技术理想化模型的模拟[J].强激光与粒子束,2018,30(1):148-152,5.基金项目
国家自然科学基金项目(GBA1501401) （GBA1501401）
