6533b7d9fe1ef96bd126b9ca
RESEARCH PRODUCT
Time resolved photoluminescence associated with non-bridging oxygen hole centers in irradiated silica
Boscaino RobertoMarco CannasVaccaro Laviniasubject
Nuclear and High Energy PhysicsRange (particle radiation)PhotoluminescenceMaterials scienceKineticsAnalytical chemistryDefects Silica Radiation effectsLaserMolecular physicsSpectral linelaw.inventionlawAstrophysics::Earth and Planetary AstrophysicsIrradiationLuminescenceInstrumentationExcitationdescription
Abstract We report time resolved photoluminescence spectra of irradiated silica under excitation with a laser tunable in the visible and UV range. The investigated samples exhibit the emission band at 1.9 eV associated with non-bridging oxygen hole centers, whose spectral and kinetics properties do not depend on the kind of irradiation (γ, β and neutrons). The 1.9 eV luminescence decay follows a multi-exponential curve with a characteristic lifetime that increases from 8.9 μs to 10.4 μs on increasing the emission energy. This dependence accounts for the blue-shift of the emission band during its decay and is interpreted as due to the inhomogeneous properties of silica leading to a distribution of kinetics features of this defect.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-06-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |