Investigation of EPR and Thermoluminescence Glow‐Curves of X‐Irradiated KCl:CrO, Ca²⁺ Crystals

Abstract

AECHALOVKClcrystalsdopedwithCr0~-andCa3+ arestudied.1tisshownthatin:hesecrystals there are impurity centres being the complexes CrOi-with anion vacancy and CrOi-with Ca2+. As aresult of Xirradiation, the Cra+ ions in these centres turn into the paramagnetic pentavalent state and show EPR spectra of' two types lettered .Al and A,. The A, spectrum is interpreted as to be due to CrS+ ions generated in the complexes with anion vacancy; the A, spectrum is assigned to the CP+ ions generated in the complexes with CaS+. A comparison with the results of thermoluminescence study shows, that heating results in the destruction of paramagnetic centres. A thermoluminescence peak a t 436 K corresponds to the A, centre destruction and a peak a t 488 K corresponds to the 82 centre destruction.