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目的根据泰勒公式和伯杰公式计算常用各向同性点源的累积因子,比较两种计算结果。方法利用泰勒公式和伯杰公式分别计算~(137)Cs和~(60)Co放射源在铅屏蔽设计中的累积因子。结果对于~(137)Cs和~(60)Co放射源,μd在1~20之间时,利用泰勒公式计算累积因子均大于利用伯杰公式计算累积因子。结论在辐射屏蔽设计中,μd在1~20之间时,利用伯杰公式计算~(137)Cs和~(60)Co放射源的累积因子所需屏蔽厚度较泰勒公式小。
OBJECTIVE To calculate the cumulative factor of commonly used isotropic point sources based on Taylor’s formula and Berger’s formula, and to compare the two results. Methods The cumulative factors of ~ (137) Cs and ~ (60) Co sources in lead shield design were calculated by Taylor formula and Berger equation respectively. Results For the 137 Cs and 60 Co sources, when the μd is between 1 and 20, the cumulative factors calculated by the Taylor formula are all larger than the cumulative factor calculated by Berger’s formula. Conclusion In the design of radiation shielding, when the μd is between 1 and 20, the shielding thickness needed to calculate the cumulation factor of 137 Cs and 60 Co emission sources by Berger’s formula is smaller than the Taylor’s formula.