Abstract
A commercial solution of 65Zn was standardized by the sum peak-method using a planar HPGe detector. The activity results were compared with measurements made with a well type 4πγ ionization chamber, which is traceable to BIPM.RI (II)-K2.Zn-65 key-comparison performed in 2002. The sum-peak value was 42.79kBq/g and the ionization chamber value was 42.74kBq/g both at the reference date. The uncertainty obtained in the sum peak standardization was 0.25% (k=1), and in the ionization chamber was 0.85% (k=1).The results showed that sum-peak method can be used in 65Zn standardization and this method is easier, simpler and more practical than others methods.
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