Effect of sulfate additives on the 60Co gamma ray induced decomposition of lanthanum, europium and terbium nitrates in solid state

Effect of cation size on the 60Co-gamma radiolytic decomposition of alkali and alkaline earth metal nitrates

“…In earlier studies on the effect of various additives such as sulphate, phosphate, carbonate, borate, oxide and halide, it has been observed that besides anion, the nature of cation also influences radiolytic behaviour (Agrawal and Garg, 1998, 1999, 2001, 2004Joshi and Garg, 1994b). In general, it has been observed that G-values are enhanced to a larger extent when a potassium salt of sulphate/carbonate/phosphate is added to NaNO 3 compared to its respective sodium salt.…”

“…Gamma radiolysis of inorganic nitrates in solid state is affected by several factors including pressure, temperature, isotopic substitution and nature and size of anion (Chen and Johnson, 1962;Johnson, 1970;Parwate and Garg, 1984;Joshi and Garg, 1994a, b;Agrawal and Garg, 1998, 1999, 2001, 2004. It has been observed that G(NO 2 À ) values increase with the charge on outer cation and the size of cation, especially in the case of pure alkali and alkaline earth metal nitrates (Joshi and Garg, 1994a, b;Kulkarni and Garg, 1984;Agrawal and Garg, 1998).…”