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 ³⁵S^2– proportion is greatly reduced while the ³⁵SO^2–₃ and ³⁵SO^2–₄ 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.