physica status solidi (b) · 1970 · 23 citations · 15 references
EngineeringCrystal Growth TechnologyExcitation Energy TransferThermal Glow CurvesChemistryLuminescence PropertyPhosphorescence ImagingOptical PropertiesPhotophysical PropertyPhotoluminescencePhysicsCrystalline DefectsPhotochemistryExciton Absorption RegionCrystal MaterialLuminescence MethodsCrystallographyKi CrystalsNatural SciencesSpectroscopyApplied PhysicsCondensed Matter PhysicsPhosphorescence
Abstract Colour centres were created in KBr and KI at 5 °K by ultraviolet irradiation, corresponding to the exciton absorption region, and traced by luminescence methods. In KBr the Frenkel defects (I‐centres) are observed in thermal glow curves, created as a result of the fundamental reaction proposed by Pooley. In KI they are not observed, but F‐, F′‐, and V K ‐centres were found in photostimulated luminescence. The dissociation of the migrating excitons at structure defects existing in crystals before irradiation seems to be important at the initial coloration stages in KI.
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