^(60)Co-γ辐照场的槽式贮源技术改造  

Studies on the technical innovation of ^(60)Co-γ radiation field

作　　者：刘虹[1] 刘宇雄[1] 

机构地区：[1]四川省农业科学院生核所,中国成都610066

出　　处：《西南农业学报》1999年第3期75-80,共6页Southwest China Journal of Agricultural Sciences

摘　　要：为增大钴源强度， 研究了γ辐照场的剂量分布和建筑物的屏蔽安全性以及水井深度与钴源贮量的关系， 并提出一种槽式贮源方法， 以利用其槽体狭缝和水层厚度来增加γ射线的屏蔽效果。结果表明： （１）钴源从１１１×１０１５ Ｂｑ 增至３７７×１０１５ Ｂｑ， 防护监测结果在本底范围， 未造成环境γ辐射水平增高； （２） 既满足科研样品的照射精度又符合商品辐照剂量的均匀性要求。On the basis of the increase of cobalt source intensity,dose distribution,shielding safety of structure and the relation between deepth of water well and Storage of cobalt source were studied,and the technical of cobalt source store in water trough was proposed to intensify shielding effect against γ radiation with crevice of trough body and water deepth .The results indicated that:(i) when the intesity of cobalt source increased from 1.11×10 15 Bq to 3.77×10 15 Bq,protection survey was in background range without increasing of γ radiation level in the enviroment;(ii)both irradiation precision to scientific research samples and the uniformity required by irradiation dose of merchandise were obtained by this appliance.This study was expected to provide a comparison for the technical transformation of similar irradiation field.

关 键 词：Γ辐照 技改 槽式贮源 应用效果 辐射育种 

分 类 号：S335.21[农业科学—作物遗传育种]