6533b7cffe1ef96bd1259b59
RESEARCH PRODUCT
In-situ observation of beta-ray induced UV optical absorption in a-SiO2: radiation darkening and room temperature recovery
Simona AgnelloLaura NuccioBruno BoizotMarco CannasFabrizio Messinasubject
Absorption spectroscopySilica irradiation effects absorptionAnalytical chemistryOptical spectroscopyWater in glass02 engineering and technology01 natural scienceslaw.inventionAbsorptionlawElectron spin resonance0103 physical sciencesBeta particleMaterials ChemistryOptical fibersIrradiationElectron paramagnetic resonanceAbsorption (electromagnetic radiation)Spectroscopy010302 applied physics[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]RadiationPhotoinduced effectsChemistryirradiation effectsSettore FIS/01 - Fisica SperimentaleSilica021001 nanoscience & nanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsAmorphous solidAbsorption bandCeramics and Composites[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Defects0210 nano-technologydescription
International audience; We studied the optical absorption in the 3.0-6.2 eV range induced in bulk amorphous SiO2 by beta-ray irradiation up to similar to 1 MGy at room temperature. The induced absorption was measured in situ both during irradiation and in the post irradiation time. Our data evidence E', center as the main defect induced by irradiation and the partial decay of their absorption band at about 5.8 eV after irradiation. A quantitative analysis of the time evolution of the induced absorption shows that the transmission recovery observed after irradiation is compatible with the reaction of radiation-induced defects with H-related (H-2, H2O) species diffusing in the amorphous matrix
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-07-01 |