湖北农业科学 ›› 2021, Vol. 60 ›› Issue (22): 156-159.doi: 10.14088/j.cnki.issn0439-8114.2021.22.033

• 贮藏·加工 • 上一篇    下一篇

60Co放射源三层排列的剂量分布

陈玉霞, 邱建辉, 鉏晓艳   

  1. 湖北省农业科学院农产品加工与核农技术研究所,武汉 430064
  • 收稿日期:2021-01-11 出版日期:2021-11-25 发布日期:2021-12-10
  • 通讯作者: 邱建辉(1979-),男,江西上饶人,副研究员,硕士,主要从事农产品辐照加工技术研究,(电话)13797056536(电子信箱)qiujianhui169@163.com。
  • 作者简介:陈玉霞(1963-),女,湖北鄂州人,副研究员,本科,主要从事电离辐射剂量及农产品辐照加工技术研究,(电话)027-87389805(电子信箱)1449107648@qq.com。

Dose distribution of 60Co radioactive sources arranged in three layers

CHEN Yu-xia, QIU Jian-hui, ZU Xiao-yan   

  1. Institute of Agricultural Products Processing and Nuclear Agriculture Technology,Hubei Academy of Agricultural Sciences,Wuhan 430064,China
  • Received:2021-01-11 Online:2021-11-25 Published:2021-12-10

摘要: 为了解74枚60Co源棒(活度为1.11×1016 Bq)在源架上作3层排列的水平剂量分布和垂直剂量分布情况,采用硫酸亚铁剂量计和低量程重铬酸银剂量计对辐射场进行布点测量。结果表明,辐照场水平方向上,离开源板的距离(x)与剂量(y)间的关系方程式为y=0.847e-0.014x,r=-0.989 3,xy在α=0.01水平上显著相关;垂直方向上剂量分布不均匀度为1.17,呈均匀分布;货物辐照不用人工换层,简化了辐照生产工艺,保证了产品辐照质量。

关键词: 60Co放射源, 3层排列, 水平剂量分布, 垂直剂量分布, 辐照工艺

Abstract: In order to understand the horizontal dose distribution and vertical dose distribution of 74 60Co source rods (activity is 1.11×1016 Bq) arranged in three layers on the source frame, the radiation field was measured by ferrous sulfate dosimeter and low range silver dichromate dosimeter. The results showed that the equation for the relationship between the distance(x) away from the source plate and the dose(y) in the horizontal direction of the irradiation field was y=0.847e-0.014x, r=-0.989 3, and x was significantly correlated with y at the level of α=0.01. The inhomogeneity of dose distribution in the vertical direction was 1.17, which showed a uniform distribution. The cargo irradiation did not have to be manually replaced, which simplified the irradiation production process and ensured the irradiation quality of the product.

Key words: 60Co radioactive source, three layer arrangement, horizontal dose distribution, vertical dose distribution, radiation process

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