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RESEARCH PRODUCT

Electron paramagnetic resonance investigation on the hyperfine structure of the center in amorphous silicon dioxide

Aldo ParlatoFranco Mario GelardiSimonpietro AgnelloGianpiero Buscarino

subject

Electron nuclear double resonanceSettore ING-IND/20 - Misure E Strumentazione NucleariChemistrySettore FIS/01 - Fisica SperimentaleSilica Electron spin resonance DefectsAnalytical chemistryCondensed Matter PhysicsCrystallographic defectElectronic Optical and Magnetic Materialslaw.inventionDelocalized electronlawMaterials ChemistryCeramics and CompositesIrradiationAtomic physicsElectron paramagnetic resonanceWave functionSpectroscopyHyperfine structure

description

Abstract We report an experimental investigation by electron paramagnetic resonance (EPR) spectroscopy on the hyperfine structure of the E δ ′ center in γ-ray irradiated amorphous silicon dioxide materials. This study has driven us to the determination of the intensity ratio between the hyperfine doublet and the main resonance line of this point defect. This ratio was obtained for a variety of silica samples and compared with the analogous ratio obtained for the E γ ′ defect. The comparison definitively confirms that the electronic wave function involved in the E δ ′ center is actually delocalized over four nearly equivalent Si atoms.

yearjournalcountryeditionlanguage
2007-04-01Journal of Non-Crystalline Solids
https://doi.org/10.1016/j.jnoncrysol.2006.10.019