shi wu wan ke lei dang liang fei dian yuan fu zhao chang zhao she liang de ce liang yu li lun ji suan
Chen Jin-zhong Mu Chang-yun The exposure in a radiation field with a large-scale extended radiation source and its theoretical estimation is shortly described in this paper. The theoretical values are in good agreement with the measurements. In case of a plate-type radiation source made up of putting numerous cobalt rods together;the distribution theory on field strength of extended radiation source may be used to evaluate the exposure distribution in the radiation field and;therefore;to obtain the places at which the dose in demanded. The relative error between the theorical and measured values is in general less than 9;.
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