Solid state reactions of radiosulphur in Ag+ doped potassium chloride

Abstract

The chemical state of 35S produced by the 35Cl(n, p)35S reaction has been studied in both pure and Ag+ doped KCl. The results indicate that in doped crystals the 35S2– proportion is greatly reduced while the 35SO2–3 and 35SO2–4 fractions have not been affected. Isochronal thermal annealing of both doped and pure crystals has been studied and the results have been compared with thermoluminescence and thermal bleaching of induced silver centres.

A good agreement is found between the temperature region of the reduction process of 35S, in the course of isochronal thermal annealing, and thermoluminescence data. A mechanism is proposed which explains the various oxidation and reduction processes in relation to thermoluminescence findings and thermal bleaching of different defect centres.