Abstract

The annealing of gamma irradiation damage in anhydrous lanthanum nitrate at different temperatures in the range 383–423 K has been investigated from a viewpoint of reaction kinetics. The annealing data have been analyzed on the basis of models developed for vacancy-interstitial combination and also on the basis of conventional chemical kinetics. Thermal annealing is found to be a combination of a fast first-order process affecting a small proportion of the fragments, followed by a predominantly slow second-order process, with a higher energy of activation, governing the behaviour of the remainder.

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