采用基于标准谱的热中子俘获瞬发活化伽玛分析方法分析NaCl水溶液

使用ＮａＩ（Ｔｌ）等能量分辨率较低但探测效率高的探测器在复杂环境进行在线热中子瞬发活化伽玛分析时宜采用基于标准谱分析方法。该方法包括标准谱完全集的获得，加权最小二乘解谱，灵敏度及归一化参数刻度等关键环节。我们采用ＮａＩ（Ｔｌ）探测器，使用＾２５２Ｃｆ中子源，对ＮａＣｌ水溶液进行了分析，获得了较好的精度。

Analysis or NaCl solution by using the method or tiermal neutron capture prompt gamma-ray analyais based on elemental standard spectra

When using detectors with better efficiency but lower energy resolution such as NaI(Tl) for the thermal neutron capture prompt gamma-ray on-line analysis in a hostile environment, a method based on elemental standard spectra is more effective. The method includes acquisition of a standard spectra's closure set, spectra fitting with the weighted-least square method, and calibration of the elemental relative sensitivity and the normalized parameters. With a NaI(Tl) detector and 252Cf neutron source, the NaCl solution was analyzed with a good precision.