Abstract
The photolysis of powdered NaClO3 exposed to 254 nm light has been investigated using unirradiated crystals and material subjected to 60Co gamma−ray irradiation. Pressure versus time curves for all samples increase monotonically and eventually exhibit a constant rate of oxygen gas evolution. The curves appear to contain one saturating exponential component and one linear component. This final stage approximates a second order dependence on light intensity. This dependence can be attributed to the photolytic generation of additional decomposition sites. Gamma−ray irradiation increases the variation from the observed almost second order dependence, decreases the magnitude of the exponential component, and decreases the time required to reach the final stage and the steady state rate. Irradiation also produces color centers and a shift in the apparent optical absorption edge. These observations are consistent with a previously developed phenomenological theory.
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