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RESEARCH PRODUCT
The study of time-resolved absorption and luminescence in PbWO4 crystals
Y UsukiS. ChernovDonāts MillersMartin NiklVladimir PankratovLarisa Grigorjevasubject
inorganic chemicalsNuclear and High Energy PhysicsAbsorption bandChemistryUltrafast laser spectroscopyDopingElectronAtomic physicsAbsorption (electromagnetic radiation)LuminescenceInstrumentationRecombinationExcitationdescription
Abstract The transient absorption and luminescence under pulsed electron beam excitation were studied for undoped and La3+ doped PbWO4 crystals. The absorption band at ∼1.0 eV is suggested to be due to self-trapped electrons and the absorption band at 3.5 eV may be due to self-trapped holes. The formation of luminescence centers via electron–hole recombination is affected by La3+ in doped crystals. The large fraction of electrons and holes undergoes thermostimulated recombination within geminate pairs and the spatial separation of geminate pairs components is important in recombination process. The intrinsic (blue) luminescence arises in this recombination. The mechanism of La3+ influence on recombination is discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-05-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |