Abstract
The isomeric effect in Szilard-Chalmers recoil of 60 m Co and 60 g Co was measured in five Co(III) complexes irradiated with pile neutrons as well as with epi-cadmium neutrons. It was found that the value of the isomeric effect is lower in the case of the irradiations with epi-cadmium neutrons and that this lowering of the isomeric effect is parallel to the reduction in the amount of 60 m Co formed in comparison with the 60 g Co. This behaviour agrees with the hypothesis, already discussed in previous papers, that the isomeric effect is due to formation of interstitial atoms of 60 g Co by decay, with internal conversion, of the 60 m Co, during the neutron irradiation.
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