GAMMA-IRRADIATION EFFECTS ON THE KINETICS OF THE NONISOTHERMAL DECOMPOSITION OF MANGANESE ACETATE TETRAHYDRATE

The thermal dehydration and decomposition of Co-60-gamma-irradiated an d non-irradiated crystals of manganese acetate tetrahydrate were studi ed using dynamic thermogravimetric techniques. The effects of radiatio n on the kinetics of the thermal decomposition reactions were studied up to a total dose of about 700 kCy. A computer program has been used for kinetic evaluation of non-isothermal thermogravimetric data accord ing to a composite integral method, Kinetic analyses of dynamic TG cur ves were discussed in view of the composite method in comparison with the methods due to Coats and Redfern and to Ozawa. The activation para meters of the decomposition reactions for non-irradiated and gamma-irr adiated crystals were calculated and the results of the different meth ods of data analysis were compared and discussed.