Abstract
It is shown that during uv irradiation of ammonium perchlorate (AP) crystals through an opaque stencil a latent photographic image of the stencil arises in their volume. This image can be developed on a crystal surface by heating at 230°C. The induction period of low-temperature decomposition (LTD) of polycrystalline AP depends linearly on the dose of preliminary uv irradiation: τ LTD = τ 0 − A log ( I · t irr). It is suggested that the mechanism of latent image formation consists of generation in the crystal volume of the chlorine oxidic products of AP photolysis—mainly ClO − 3 ions. Based on these considerations one is able to explain in a consistent way all the experimental data obtained: τ LTD dependence on dose, dependence of thermal development time on the concentration of proton-active additives, dependence of the image optical density on crystal depth, etc.
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