^(90)Sr对衡阳地区大米及谷壳的总β放射性的贡献率  

The Contribution Rate of ^(90)Sr on the Rice and Chaff Total β Radioactivity in Hengyang

作　　者：谭延亮[1,2] 唐泉[2] 肖德涛[2] 邹之利[2] 李风光[2] 

机构地区：[1]衡阳师范学院物理与电子信息科学系,湖南衡阳421008 [2]南华大学核科学技术学院,湖南衡阳421001

出　　处：《衡阳师范学院学报》2012年第3期44-46,共3页Journal of Hengyang Normal University

基　　金：湖南省自然科学基金科研计划项目(09JJ6027);衡阳师范学院教学改革研究项目(Jykt201005)

摘　　要：人们通过食用稻米,导致放射性物质进入体内。90Sr是核裂变的产物,以气溶胶的形式沉降,它在人体中参与钙的代谢过程进入骨骸,难以排除体外。对衡阳地区10个水稻品种的90Sr对大米及谷壳的总β放射性的贡献率进行了实验研究,得到90Sr对大米的总β放射性的平均贡献率为:9.6%±6.2%;90Sr对谷壳的总β放射性的平均贡献率为:24.1%±12.2%。提出谷壳、稻杆、牧草等饲料由于对放射性气溶胶的截获效应具有较高的90Sr含量,其在动物体内骨骼上可能进一步富集,对人类的危害性有待进一步研究。The radioactive substances can be brought into human body by eating rice, and ^90Sr is a by-product of nuclear fission which is found in nuclear fallout and presents a health problem since it substitutes for calcium in bone, preventing expulsion from the body. We conducted the experimental study on the contribution of ^90Sr on the rice and chaff total β radioactivity of 10 kinds paddy in different parts of Hengyang. We found out that the average contribution rate of ^90Sr β radiation on the rice total radiation is 9.6%± 6.2 %; and the average contribution rate of 90 Sr β radiation on the chaff total β radiation is 24.1%± 12.2 %. It is proposed that the ^90 Sr content in chaff, straw, grass and other forage may be high for the intercepted effect of the radioactive aerosol. The ^90 Sr will be rich in the bones of animals for human consumption. Its harm to human needs further study.

关 键 词：大米 谷壳 90Sr 总β 放射性 

分 类 号：X125[环境科学与工程—环境科学]