Dose nonuniformity estimation method for scientific test of cobalt source device

In this paper, there are some problems in the scientific test station and irradiation process of cobalt source irradiation device, such as long calibration cycle of chemical dosimeter and large approximate calculation error of point source. we use body source formula pushdown and Monte Carlo algorithms to establish the relationship between spatial coordinates and dose rate in cobalt source device. Furthermore, The estimate the spatial regional heterogeneity of test samples is built by Monte Carlo method. It provides a reference for scientifically formulating the irradiation scheme design of cobalt source devices.