摘要
叙述了辐射加工级电子束吸收剂量量热计的设计原理,给出了用自行研制的石墨和盒式水量热计测定电子束吸收剂量的方法和结果。用不同吸收体材料和几何参数量热计测量参考材料的吸收剂量,所得结果在08%以内符合。并对现有的吸收剂量深度分布测量模体的关键结构作了改进。由测量结果刻度GAFDM1260和FWT60辐射显色薄膜得到的电子束吸收剂量响应曲线与60Coγ射线响应一致。
The design principle of calorimeter for electron beam absorbed dose at radiation processing level is concisely described. The methods and results of measuring electron beam absorbed doses with the developed graphite and polystyrene water calorimeters are given. The absorbed doses of reference materials are determined with calorimeter using different absorbing materials and geometric parameters and the results are consistent within 0.8 %. The specially designed phantom for absorbed dose depth distribution mapping can cancel the uncertainty caused by the geometric factors in point source measuring. The absorbed dose response curves of GAF DAM 1260 and FWT 60 radiochromic film to electron beams calibrated by this work are consistent with those to 60 Co gamma rays. The developed calorimeter and measuring methods can be used as measurement standard and dissemination of the value of the absorbed dose determining in accelerator's electron beam radiation sources.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2000年第1期41-48,共8页
Atomic Energy Science and Technology
关键词
辐射加工
电子束
吸收剂量
量热计
Γ射线
radiation processing
electron beam
absorbed dose
calorimeter
