Abstract
Fission fragment tracks were registered on the surface of alumino-borate glass using natural uranium foil as external radiator followed by chemical etching in hydrofluoric acid. In another glasses, of the same base composition to which uranium atoms (as internal radiators) were added, neutrons were applied directly on its surface and the tracks were detected. The track densities in both cases were found to be a function of neutron doses. However, in the former case, the relative volume of the track was found to increase with increasing etching time, while that of the second case seems to increase an the initial stages of etching and then hardly changes in a certain region, after which it increases again. The relative volume of the tracks in the second case is smaller when compared with that in the former case, however, application of gamma radiation seems to increase again the relative track volume. The results are discussed on the basis of structural changes that may occur during the interaction of neutron and gamma radiation with glass.
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