为比较不同方法拟合辐照剂量分布的相关度，本文基于空气比释动能计算公式和γ射线指数减弱规律两种方法分别拟合辐照室地面的剂量率分布；计算结果表明，两种方法都能较好反映测量区域的辐射剂量场分布，基于空气比释动能计算公式的拟合结果相关度要稍高于指数减弱规律的拟合结果。

In order to compare the fitting relevance in different methods of radiation dose distribution on the ground of irradiation chamber, the air kerma formula and the attenuation law of γray were used independently to fit the measurement data. Both two methods have a close correlation with the measured data. Nevertheless, the airkermaformulabased fitting method is slightly better than the attenuationlawbased method.