| 60Co辐照装置增源后剂量场分布及剂量测定 |
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| 作者姓名： | 郑向华 陈文捷 董智挺 陈 荣 黄挺俊 |
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| 作者单位： | 福建省农业科学院水稻研究所 福州350019 |
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| 基金项目： | 国家人事部（国人部发乜003]50号）留学回国人员择优资助项目“多途径辐射诱变选育杂交早稻恢复系”. |
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| 摘 要： | 为使60Co辐照装置增加总活度为28878居里(1．07PBq)由7根活度不同的进口源棒的增源顺利启用,通过测定源到辐照位置的重复性为0．14％<1％,符合标准。测定从铁皮盖板到源中心的高度为90．3cm。五次升源所得剂量率(Gy/min)分别为:11．4、10．95、10．98、10．89、10．87,相对偏差为0．55％<1％．说明辐射场空间剂量率精确性高。计算辐照场空间分布的不均匀度U0=Dmax／Dmin=1．46(U0<1.5),表明在同一参考面上,辐射源剂量场剂量分布符合要求。
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| 关 键 词： | 60Co辐照装置 剂量场 剂量测定 |
Dose Field Distribution and Dose Measurement before Commissioning of 60Co Irradiation Facilities |
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| Authors: | Zheng Xianghu Chen Wenjie Dong Zhiting Chen Rong Huang Tingjun |
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| Institution: | Rice Research Institute, Fufian Academy of Agricultural Sciences Fuzhou 350019 |
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| Abstract: | Seven different-activity cobalt sticks with 28878 couriers had been added to 60Co irradiation facilities. Accuracy measurement cobalt source to irradiation position repeatability was 0.14%<1%.The height from iron cover board to center source was 90.3cmo The aerial dose rate (Gy/min) at radiation field had been checked ,that is 11.04> 10.95% 10.98> 10.89,10.87, and the relative deviation was 0.55%<1%. The dose uniformity ratio at radiation field was 1.46(U0<1.5).A11 these showed a reasonable distribution of radiation source before commissioning of 60Co irradiation. |
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| Keywords: | ~(60)Co irradiation facilities Dose field Dose measurement |
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