Influence of Polymodal Radiation Processes on Thermoluminescence and Its Quenching in MgO:Mn²⁺ Crystals

Abstract

This comprehensive study relates to the most radiation‐sensitive peaks (450 and 550 K) of high‐temperature (300–775 K) thermally stimulated luminescence (TSL) of MgO:Mn2+ crystals, with impurity content of 77, 155, and 285 ppm, irradiated with fast electrons. For a more complete and clearer picture of the nonmonotonic (polymodal) radiation processes stimulated in doped crystals, the results of a study of a group of nominally pure crystals irradiated under the same experimental conditions are also considered. Based on the correlation of the dose dependences of the studied characteristics, the mechanisms of TSL peaks formation are established. Despite a much lower concentration than divalent manganese ions, ferric ions cause significant changes in thermoluminescence and its quenching in irradiated MgO:Mn2+ crystals.