魏计房, 王荣元, 王伟, 张馨星, 邓春梅, 姚海燕, 丁凯, 张蒙蒙. 海水中137Cs γ能谱测量的效率刻度研究[J]. 海洋环境科学, 2019, 38(3): 342-346, 352. DOI: 10.12111/j.mes20190304
引用本文: 魏计房, 王荣元, 王伟, 张馨星, 邓春梅, 姚海燕, 丁凯, 张蒙蒙. 海水中137Cs γ能谱测量的效率刻度研究[J]. 海洋环境科学, 2019, 38(3): 342-346, 352. DOI: 10.12111/j.mes20190304
WEI Ji-fang, WANG Rong-yuan, WANG Wei, ZHANG Xin-xing, DENG Chun-mei, YAO Hai-yan, DING Kai, ZHANH Meng-meng. Study on efficiency calibration of 137Cs γ-spectrum analysis in seawater[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2019, 38(3): 342-346, 352. DOI: 10.12111/j.mes20190304
Citation: WEI Ji-fang, WANG Rong-yuan, WANG Wei, ZHANG Xin-xing, DENG Chun-mei, YAO Hai-yan, DING Kai, ZHANH Meng-meng. Study on efficiency calibration of 137Cs γ-spectrum analysis in seawater[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2019, 38(3): 342-346, 352. DOI: 10.12111/j.mes20190304

海水中137Cs γ能谱测量的效率刻度研究

Study on efficiency calibration of 137Cs γ-spectrum analysis in seawater

  • 摘要: 基于实验室无源效率刻度技术LabSOCS,分别从样品源基质成分、相对探测器几何位置、质量和密度四个方面开展了海水中137Cs的γ能谱测定过程中的效率刻度研究。结果表明,样品源基质成分和相对几何位置的差异对探测器探测效率的影响可以忽略。探测效率与样品源质量和密度的关系则采用统一的二元二次多项式进行描述,复相关系数高达0.99946。研究结果为海水中137Cs活度浓度的γ能谱测定提供了理论基础。

     

    Abstract: Based on the LabSOCS software, studies on the detector efficiency calibration of the 137Cs γ-spectrum analysis in the seawater were performed under different aspects of sample compositions, relative geometric positions to the detector, masses and densities.The results revealed that the effects brought by sample compositions and relative positions to the detection efficiency could be ignored.A unit duality quadratic polynomial was employed to describe the relationship between detection efficiency and sample mass as well as density, and the result showed that the multiple correlation coefficient could reach as high as 0.99946.These results have replenished theoretical basis for the 137Cs γ-spectrum analysis in the seawater.

     

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