高级检索

HPGe γ谱仪对主动式活性炭法中222Rn样品的探测效率研究

Study of Detection Efficiency of 222Rn Samples Obtained by Active Activated Charcoal by HPGe γ Spectrometry

    摘要
  • 摘要: 主动式活性炭吸附222Rn的方法中，吸附时间不同，222Rn在活性炭盒中的分布不均匀，这对HPGe γ谱仪测量分析中效率刻度产生影响。通过在标准氡室进行的主动式双滤膜活性炭吸附实验，分析得到不同吸附时间下HPGe γ谱仪对222Rn子体不同能量特征γ射线的探测效率和222Rn在双滤膜活性炭盒中进出口计数相对偏差，拟合得到两者之间的关系曲线，即不同能量特征γ射线下的探测效率与222Rn进出口计数相对偏差呈线性关系。通过实验得到双滤膜活性炭盒对氡吸附量的拟合曲线值与测氡仪实测值相对偏差绝对值小于5%，验证了该方法的正确性和可靠性。

     

    Abstract: In active adsorption of activated charcoal, it is uneven distribution of 222Rn in the collector in different adsorption time, which makes impact on efficiency calibration by HPGe γ spectrometry. By the adsorption experiment of active double-membrane activated charcoal in the standard radon chamber, the relationship between detection efficiencies of different energy characteristics of the γ-ray and counting relative deviation of 222Rn from import and export side of the double-membrane activated charcoal collector by HPGe γ spectrometry in different adsorption time was obtained, which is linear. The absolute value of relative deviation of adsorption capacity for 222Rn is less than 5% between calculated and measured, which is to verify the correctness and reliability of the method of active double-membrane activated charcoal.

     

    • HTML全文
    • 参考文献(7)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回