10MeV电子直线加速器辐照工艺确定的简便方法及其应用  

Development of an Easy and Effective Method for 10MeV Linear Accelerator Irradiation and Its Application in Food Process

作　　者：陈志军[1,2] 戚文元[1,2] 颜伟强[1,2] 岳玲[1,2] 王海宏[1,2] 包英姿[1] 袁忠谊[1] 徐贇[1] 孔秋莲[1,2] 

机构地区：[1]上海市农业科学院,上海201403 [2]上海束能辐照技术有限公司,上海201403

出　　处：《核农学报》2016年第4期755-763,共9页Journal of Nuclear Agricultural Sciences

基　　金：国家科技支撑计划(2014BAA03B00);国家高技术研究发展计划项目(863)(2011AA100804);上海市农产品保鲜与加工技术服务平台(14DZ2293900)

摘　　要：为简化辐照工艺制定方法,以10Me V电子直线加速器为研究对象,利用铝片叠层法测定电子束单双面辐照时铝片中的剂量分布情况,并以此为基础推算、建立并验证不同密度产品10Me V电子束单双面辐照的深度剂量分布曲线,得出10Me V电子束辐照时各射程深度与材料密度的关系公式。根据深度剂量分布曲线,明确了双面辐照时均一密度产品在不同辐照深度情况下对应的剂量不均匀度(U)。以U≤2.5为标准,将产品按不同厚度分类,建立相应的辐照加工工艺,且实际生产应用效果良好。本研究对10 Me V电子直线加速器辐射加工工艺制定具有一定的指导意义。The goal of this study was to develop an easy and effective method to simplify processing procedures using10 Me V linear accelerator irradiation.Depth-dose distributions were experimentally measured using aluminum sheets which were irradiated by 10 Me V linear accelerator in one-sided and two-sided way,respectively.Depth-dose distribution curves for one-side and two-side irradiated products of different densities were established based on the data of irradiated aluminum sheets.The simple computational formulas of density and irradiation range parameters（ Ropt,R50 e,Rp） were established too.Dose uniformities of two-side irradiated products at different depth were calculated according to the related curves.Products were classified into different groups of depth according to the dose uniformity（ U ≤2.5）,and appropriate processing techniques were established for real samples to ensure the effectiveness of the irradiation.This study should be helpful for proper use of 10 Me V electron beam irradiation in food.

关 键 词：电子加速器 辐照工艺 深度剂量分布 剂量不均匀度 

分 类 号：TL53[核科学技术—核技术及应用]