中文摘要：

对NaI（Tl）探测器的γ能谱进行了MC模拟，模拟研究了不同源-探距、不同能量分辨率、不同模拟时间和平面源分布等条件下的^137Csγ能谱。^137Cs点源的模拟谱与实测谱的对比表明两者基本相符。

英文摘要：

In this paper, we simulate a NaI（Tl） scintillation detector responses at different source-detector distances, energy resolutions of the detector and computer time, with models of a point ^137Cs source and a planar ^137Cs source. Measurement was performed with a ^137Cs point source and the NaI（Tl） γ-ray spectrometer. The MC simulated spectra and the measured data are in good agreement.