野外γ谱仪刻度的蒙特卡罗模拟

Monte Carlo Simulation of the Field Gamma Spectrometer Calibration

用蒙特卡罗方法对NaI（T1）野外γ谱仪刻度进行模拟，计算谱仪的响应系数。通过与实验的比较，研究利用蒙特卡罗方法对NaI（T1）野外γ谱仪进行刻度的可行性。结果表明，当模拟探测器对^137Cs的能量分辨率从8％～14％变化时，模拟结果与实验结果的差别在12％以内。

Monte Carlo method is used to simulate the spectrum measured by NaI（T1） gamma spectrometer for the field spectrometer calibration, and the response coefficients of the NaI（T1） gamma spectrometer is calculated. By comparing the calculation results with the experimental results, the possibility of using Monte Carlo method for field NaI（T1） gamma spectrometer calibration is studied. The result shows that the difference of response coefficients between simulation results and experimental results is less than 12% when the energy resolution of spectrometer for Cs-137 is varied within 8-14%.