中国先进研究堆实验室HPGe探测器无源效率刻度方法研究

针对中国先进研究堆（CARR）实验室目前现有的HPGe探测器，使用无源效率刻度方法对其探测效率进行了理论计算，比较了不同能量和样品体积下蒙特卡罗方法和数值积分方法计算的探测效率。测量了探测片（点源）和堆水池池水（体源），实验测量结果和计算结果符合良好，验证了无源效率刻度方法的可行性及所建模型的合理性，与采用标准源刻度的实验方法相比，该方法突破了各种限制，减少了标准源的制备工作，节省了大量的实验成本和时间，拓宽了HPGe探测器的使用范围。

Research on Detection Efficiency of HPGe Detector without Standard Source Calibration in CARR Laboratory

Considering the real fact of CARR Laboratory’s HPGe detector, the detection efficiency without standard source calibration was calculated. The detection efficiency calculated by Monte Carlo method was compared with that by numerical integration method in terms of energy and volume. After measuring the activated piece (point source) and water sample (volume source), the experimental results agree well with calculated results, validating the feasibility and accuracy of calibration method without standard source. Compared with standard source calibration experiment, this method breaks through many limitations, reduces the work of preparing standard source, saves lots of time, and also greatly broadens the application scope of HPGe detector.