Kinetics of dehydration of unirradiated and γ-ray irradiated neodymium (III) acetate hydrate with 10 3 kGy total γ-ray dose absorbed in air atmosphere were studied by isoconversional nonisothermal method. The dehydration proceeds in two steps with the elimination of 0.8 and 0.4 mol of H 2 O, respectively. This result indicates that the investigated neodymium (III) acetate hydrate contains 1.2 mol of crystalline water in its structure. The dehydration reactions are best described by nucleation (A 2 model) and gas diffusion (D 4 model) for unirradiated and γ-ray irradiated samples, respectively. Analysis of the kinetic data using linear and nonlinear isoconversional methods showed that the apparent activation energy, E a (kJ/mol) is dependent on the conversion degree, α, of the dehydration process. The E a− α plots for both unirradiated and γ-ray irradiated neodymium (III) acetate hydrate showed that the dehydration is a …