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为减少统计涨落对能谱测量的影响-提高测量的精确性,利用数理统计理论,研究Bootstrap非参数法的基本原理及程序流程,并将其应用于实验室γ能谱数据处理中。用NaI(T1)探测器测量~(241)Am、~(137)Cs、~(60)Co的γ能谱,对短时间测量的γ能谱采用Bootstrap非参数法进行处理-与同样条件下长时间测量的γ能谱数据进行对比,吻合度较高,得到了满意的结果,为实现γ能谱在低活度水平的快速测量提供了可行的技术方案。
In order to reduce the influence of statistical fluctuation on the energy spectrum measurement - to improve the accuracy of measurement, the basic principle and procedure of Bootstrap nonparametric method are studied using mathematical statistics theory and applied to the processing of γ-ray data in laboratory. The γ spectra of ~ (241) Am, ~ (137) Cs and ~ (60) Co were measured with a NaI detector. The γ spectra measured for a short time were processed by Bootstrap nonparametric method. The long-time measurement of γ-ray data is compared, the coincidence degree is high, and satisfactory results are obtained, which provides a feasible technical scheme for realizing the rapid measurement of γ-energy spectrum at a low activity level.