摘要
本文介绍了一种有限烟云外照射剂量计算方法——光子“射程”法 ,该方法的特点是将受照者周围一个以光子在空气中平均自由程 (文中简称为“射程”)的 5倍范围内的烟云划分为一些体积元来计算其外照射剂量 (或剂量率 )。计算出的空气外照射剂量转换因子和空气吸收剂量率与有关文献给出的值或图解法、离散点近似法的计算结果相当一致。该方法适于与三维数值大气扩散模式配合使用。
A calculating method of finite cloud external exposure dose——Gamma photo “range” method is presented in this paper. The main feature of the method is that the cloud around a receptor in a range determined by the effective gamma photo “range”the relaxation length, is finitely divided to many volumetric units for air external exposure dose or dose rate calculation. The calculated air external dose rate conversion factors and air absorbed dose rate are in agreement with those presented in related literatures, obtained by nomogram method and discrete point approximation method. The application of this method with 3 dimensional atmospheric dispersion models is suitable.$$$$
出处
《辐射防护》
CAS
CSCD
北大核心
2001年第2期77-82,共6页
Radiation Protection
