Interaction of positronium with Co⁺² and Cu⁺² ions in aqueous chloride and sulphate media

Abstract
The interactions of positronium in aqueous solutions of Co⁺² and Cu⁺² ions at 297⁰K in the presence of chloride and sulphate ions were studied at varying concentrations of the ions using LS and DBARL techniques. In the case of Co⁺², the results suggest a spin conversion reaction, while for Cu⁺², there is predominently an oxidation reaction with a small contribution of spin conversion. In both cases the reaction rate constants were calculated. The Different behaviours of Co⁺² and Cu⁺² ions are discernable from the results. A different trend in the variation of the DABRL narrow component with concentration is observed for Cu⁺² ions in Cl^- and SO^-2₄ media.