Abstract
Transfer of 99mTc impurity atoms formed in metallic molybdenum by the nuclear transformations [98Mo(n,γ)99Mo → β-decay] was studied. At annealing of the metal in the range of α → γ polymorphic transition, the accelerated diffusion (transfer rate >10-17 m2 s-1 at ≈1000 K) is accompanied by transfer of 99mTc impurity atoms into the gas phase. This phenomenon can be used in the development of radiolysis-resistant 99Mo/99mTc generators in which the parent molybdenum is obtained by radiation neutron capture.
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