译 名：
DISTRIBUTIVE LAWS OF GRID PLATE ~(60)Co SOURCE IN RADIATION FIELD
作 者：
Ha Yiming;Cheng Shuhan;Niu Chuantang Shandong Agricultural University. Taian, China 271018
关键词：
cobalt source;;grid plate source;;exposure rate
摘 要：
Using the distributive law in point source radiation field,a mathematical model of radi- ation field distribution of~(60)Co grid plate source was constructed according to source deriva- tions.Using advantage of the fortran porgram designed by ourselves,the distributive curve, we can print the equal exposure rate on a general printer in IBM-PC computer.By using the above-mentioned ways,the vary law of radiation field versus coordinate was repre- sented in image and quantification.As an example,we discuss the influence of field distribu- t ion which was producted by arranging every source tube activity and its position. Furthermore,we compared the theoretical and actual values at the points on equal dose rate curve 1.5 and 2.0m from the source plate.The result shows that theoretical discription was finely fitted with actual values measured with Farmer 2570/1B and Fricke dosemeters.Research on effect of scatter and shielding on radiation field distribution is in progress.
