Abstract

Under pile irradiation uranyl iodate decomposes, elementary iodine being formed. The amount of decomposition is proportional to the number of fissions that occur; the G factor is 5·8 iodine atoms per 100 eV of recoil energy absorbed. A constant proportion (14 per cent) of the 131I formed in fission is extracted with the reduced iodine, irrespective of the extent of decomposition. This is interpreted as the result of the chemical reaction involving the primary fission fragment and its surroundings.

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