6533b82efe1ef96bd12925fc
RESEARCH PRODUCT
Tl-related radiation defects in CsI:Tl
Uldis RogulisUldis RogulisJohann Martin SpaethE. ElstsA. Dolgopolovasubject
RadiationChemistryMagnetic circular dichroismResonanceElectronDichroismMolecular physicsSpectral linelaw.inventionNuclear magnetic resonanceUnpaired electronlawElectron paramagnetic resonanceInstrumentationHyperfine structuredescription
Abstract Angular dependencies of the EPR spectra detected via the magnetic circular dichroism of the optical absorption (MCDA-EPR) observed in the MCDA bands at 355, 411, 425, 442, 465, 536, and 815 nm of γ- or X-irradiated CsI:Tl crystals have been investigated. The MCDA-EPR spectrum at B || [1 0 0] consists of two quartets of intense lines. The spectrum could be satisfactorily explained taking into account hyperfine (hf) interactions of unpaired electron with S= 1 2 with three Tl nuclei I ( 205 Tl , 203 Tl )= 1 2 . Therefore we propose as a model a Tl-trimer centre. The hf interactions along a [1 0 0] direction with two equivalent Tl and one single Tl were observed. As a centre model we propose TlCs++–Tli0–TlCs++. The Tl hf interactions observed can be explained qualitatively in a ionic model for this trimer centre.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-08-01 | Radiation Measurements |