6533b826fe1ef96bd1283a88
RESEARCH PRODUCT
Thermoactivated spectroscopy of heterovalent impurity traps in CdWO4
L. L. NagornayaI. T LeandV. T Lesubject
Free electron modelNuclear and High Energy PhysicsRadiationChemistryCondensed Matter PhysicsMolecular physicsThermoluminescencechemistry.chemical_compoundImpurityCadmium tungstateGeneral Materials ScienceCharge carrierEmission spectrumLuminescenceSpectroscopyNuclear chemistrydescription
Abstract Recombination luminescence emission spectra, TSL and trap spectra estimated by fractional glow technique (FGT), in nominally pure and Li-, Bi- and Ho-doped CdWO4, crystals are reported. According to the investigations by FGT heterovalent impurities Li, Bi and Ho causes localized electronic states which act as traps for charge carriers. It is shown that TSL results in emission of known blue-green luminescence band by emptying of the Li+-related traps in CdWO4-Li and yellow luminescence band by emptying of the Bi3+-related traps in CdWO4-Bi. It is proposed that blue-green and yellow luminescence occur by recombination correspondingly of free holes and free electrons at different intrinsic tungstate group related luminescence centers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-12-01 | Radiation Effects and Defects in Solids |