6533b7d2fe1ef96bd125e04f
RESEARCH PRODUCT
RbBr and CsBr doped with Eu2+ as new competitive X-ray storage phosphors
J.-m. SpaethS. AssmannUldis RogulisUldis RogulisStefan Schweizersubject
RadiationPhotoluminescenceChemistrybusiness.industryPhotostimulated luminescenceMagnetic circular dichroismAnalytical chemistrychemistry.chemical_elementPhosphorlaw.inventionParamagnetismOpticslawLuminescenceEuropiumbusinessElectron paramagnetic resonanceInstrumentationdescription
Abstract After X-irradiation of the alkali halides RbBr and CsBr doped with divalent Eu a significant photostimulated luminescence (PSL) effect was found. In both systems the electron trap centre is an F centre, the hole trap centre is still unknown. The Eu 2+ aggregation with cation vacancies plays an important role. Although all of the different Eu 2+ aggregates seem to show PSL effects, they have different PSL efficiencies, decay times and spectral characteristics. In the case of RbBr:Eu 2+ it was possible to investigate the different Eu 2+ -cation vacancy aggregate states by magnetic circular dichroism of the optical absorption (MCDA) and MCDA-detected electron paramagnetic resonance. In Eu 2+ -doped CsBr no paramagnetic Eu 2+ aggregate nor isolated Eu 2+ was found, in spite of intense and typical Eu 2+ -related PSL effects.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-10-01 | Radiation Measurements |