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Report No.

Study on $$^{99}$$Mo production by Mo-solution irradiation method, 3; Activation analysis of irradiation target

Huynh, T. P.*; Inaba, Yoshitomo  ; Ishida, Takuya; Ishikawa, Koji*; Tatenuma, Katsuyoshi*; Ishitsuka, Etsuo   

The impurity concentration in both (NH$$_{4}$$)$$_{6}$$Mo$$_{7}$$O$$_{24}$$ and K$$_{2}$$MoO$$_{4}$$ solutions, which are selected as advanced targets of Mo-solution irradiation method for $$^{99}$$Mo production, was determined by the Instrumental Neutron Activation Analysis (NAA) using k$$_{0}$$-standardization method. As a result, Na, Mn and W were identified as impurities in the as received molybdate. After the compatibility test with structural material (SUS304) under $$gamma$$-ray irradiation, activation analysis of molybdate solutions was also carried out. It was found that the identified impurity concentration was stably staying in solutions and no element comes from the structural material by the NAA method. However, small corrosion of structural material was observed from the ICP measurement.



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