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一随着原子能和平利用事业的发展,越来越多种类的外照射放射源用于农业科学研究中。目前用得最多的还是~(60)Co,对于一个农用钴源,要求它有足够的强度,有尽量均匀的剂量场,操作简单,使用安全。为了达到上述目的,在建源以前,要精心设计,确定源的强度,设计源的排列组合,计算防护条件;建源以后,也要定期地进行剂量场的标定和计算。所有
With the development of the cause of peaceful use of atomic energy, more and more types of external radiation sources are used in agricultural science research. Currently used up to ~ (60) Co, for an agricultural cobalt source, requiring it to have sufficient strength, as uniform dosage field, simple operation, safe use. In order to achieve the above objective, before the construction of the source, we must carefully design and determine the strength of the source, the design of the source arrangement and calculation of protective conditions; after the construction of the source, but also on a regular basis dose field calibration and calculation. all