HUBEI AGRICULTURAL SCIENCES ›› 2021, Vol. 60 ›› Issue (22): 156-159.doi: 10.14088/j.cnki.issn0439-8114.2021.22.033

• Storage & Processing • Previous Articles     Next Articles

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

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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