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同位素  2014 

γ射线参考辐射周围剂量当量标准电离室的蒙特卡罗模拟

DOI: 10.7538/tws.2014.27.03.0152, PP. 152-156

Keywords: γ射线,周围剂量当量H*(10),标准电离室,MCNP4C

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Abstract:

由放射源137Cs和60Co产生的γ射线参考辐射在辐射监测仪表的校准中起着重要作用。对于场所辐射监测仪表的校准,参考辐射需提供周围剂量当量H*(10)的约定真值。本研究采用H*(10)标准电离室法测定周围剂量当量H*(10)的约定真值,利用MCNP4C蒙特卡罗模拟程序,提出了基于双金属补偿法的电离室结构设计方案。结果表明,在15~1500keV能量范围内,该电离室能量响应满足国际标准ISO4037-4的要求,该研究结果对H*(10)标准电离室的建立具有重要的指导作用。

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