瞬发伽马活化分析与中子层析照相联合测量技术  

Combination of Prompt Gamma-ray Activation Analysis and Neutron Tomography

作　　者：杨鑫[1] 李润东[1] 王冠博[1] 唐彬[1] 孙勇[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《同位素》2017年第3期153-163,共11页Journal of Isotopes

基　　金：国家自然科学基金资助项目(11475152;11405151)

摘　　要：介绍瞬发伽马(中子)活化分析(prompt gamma-ray neutron activation analysis,PGAA/PGNAA)技术的发展应用情况与国际上的最新研究成果。将PGAA与中子层析照相(neutron tomography,NT)技术结合,利用中子层析照相重建结果,得到样品内部三维结构,研究中子束流在样品内部的衰减过程,确定样品内部特定位置处的中子束流强度,获得其强度分布。结合PGAA与NT,可以实现不对样品拆解取样,对其内部元素成分进行三维分布分析。国际上,德国FRMⅡ研究堆与匈牙利布达佩斯研究堆的中子束流上已建成相关装置,并在天文、考古领域得到应用。国内相关研究也相继启动。Applications and progress of prompt gamma-ray neutron activation analysis （PGAA /PGNAA ） were presented. PGAA was combined with neutron tomography （NT）,which was used to reconstruct the 3D construction inside a sample and the neu-tron beam attenuation inside the sample could be estimated. Further more, neutron beam intensity at a specific position also could be evaluated by N T . The combination of PGAA and NT was able to analyse 3D distributions of elements inside samples without being disassembled. The PGAA-NT facilities were built at FRM ! and Budapest research reactor, which were applied to study astronomy and ancient samples. The PGAA-NT combination technique is being developed in China.

关 键 词：瞬发伽马活化分析 中子层析 无损检测 图像重建 

分 类 号：TL816.3[核科学技术—核技术及应用]