【摘要】 瞬发伽马中子活化分析(PGNAA)为非破坏性、在线测量的核分析方法。目前国际上有30多座研究堆建立了PGNAA实验室。本文介绍了三种定量瞬发伽马活化分析方法:相对法、校准曲线法、k0因子法,阐述了基本原理及其应用领域,以及针对短寿命核素高精度测量的束流斩波器技术,针对大样品测量带来的中子自吸收和伽马自屏蔽效应的内标法。此外还简介了基于CARR堆的热中子瞬发伽马活化分析装置进展情况,对国内的PGNAA问题进行了探讨。更多还原

【Abstract】 Prompt Gamma Neutron Activation Analysis(PGNAA)is one of the nondestructive and On-line measurement of nuclear analytical methods,There are more than30 PGNAA laboratories which are established based on the research reactor currently.The basic principle and the application field of three kinds of analytical method of PGNAA were introduced,such as the relative comparison method、calibration method、k0-factor method.The short life nuclides is proposed using the beam chopper technique in order to improve the measurement accuracy.The internal standard method was proposed for that large sample neutron measurement that brings self absorption and gamma-ray self shielding effect.The PGNAA system was introduced at CARR.It provides methodology reference to establish the prompt gamma activation analysis on the base of CARR for our country.更多还原