γ射线发射率的测量

  • 摘要: <正> 1982年中国计量科学院组织了国内~(152)EUγ射线发射率的测量比对。利用1979年国际比对的~(152)Eu标准源的γ射线发射率值刻度130 cm~3Ge(Li)探测器,然后测量~(22)Na等7个刻度源的九条γ射线发射率,以便和来自英国放化中心以及中国计量科学院用基准方法测量的结果相比较,反过来验证~(152)Eu标准源的可靠性。

     

    Abstract: A home intercomparison of emission rate measurements by means of Ge(Li)detector and ~(152)Eu source was organized by National Institute of Metrology (NIM).~(152)Eu standard source was used for the efficiency calibration of 130 cm~3 Ge(Li)detector. The emission rate of gamma rays of ~(22)Na (1274.5 keV), ~(54)Mn (834.85keV),~(57)Co (122.06 keV), ~(60)Co (1173.22 keV, 1332 keV), ~(134)Cs (604. 66 keV, 795.76keV), ~(137)Cs (661.65 keV) and ~(133)Ba (356.04 keV) were measured with estimatederrors less than 2%. Our results are compared with results of center of EnglishRadiochemistry as well as those of NIM.

     

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