Gamma Ray induced decomposition of lanthanide double nitrates with some bivalent cations

Abstract

The gamma ray induced decomposition of double nitrates of Pr and Gd with Mg²⁺, Co²⁺ and Zn²⁺ has been studied over a wide absorbed dose range upto 640 kGy at room temperature. Also, the radiolytic decomposition of Nd, Sm and dy double nitrates with Mg²⁺ and Zn²⁺ has been investigation at an absorbed dose of 205 kGy. The G(NO<img src='http://www.niscair.res.in/jinfo/twobar.gif' border=0>) values depend on the absorbed dose, nature of the lanthanide ion and the bivalent outer cation. The G(NO<img src='http://www.niscair.res.in/jinfo/twobar.gif' border=0>) for all the lanthanide double nitrates at an absorbed dose of 205 kGy follow the order Mg²⁺, Co²⁺ > Zn²⁺. The double nitrates with Mg²⁺ exhibit G(NO<img src='http://www.niscair.res.in/jinfo/twobar.gif' border=0>) values at same dose in the order Nd³⁺ <img src='http://www.niscair.res.in/jinfo/tiled1.gif' border=0> Gd³⁺ > Sm³⁺ > Pr³⁺ > La³⁺ > Dy³⁺ > Ce³⁺ whereas for Zn²⁺ salts the order is changed to Ce³⁺> Nd³⁺ <img src='http://www.niscair.res.in/jinfo/tiled1.gif' border=0> Sm³⁺ > Gd³⁺ <img src='http://www.niscair.res.in/jinfo/tiled1.gif' border=0> Pr³⁺ > La³⁺.