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RESEARCH PRODUCT
Photoluminescence in gamma-irradiated alpha-quartz investigated by synchrotron radiation
Franco Mario GelardiRoberto BoscainoAnatoly N. TrukhinMarco CannasSimonpietro Agnellosubject
QuenchingRadiationPhotoluminescenceChemistryRadiochemistryGamma rayAnalytical chemistrySynchrotron radiationCrystallographic defectoptical fibers radiation effects radiation-induced attenuationAbsorption bandPhotoluminescence excitationIrradiationInstrumentationdescription
Abstract We report an experimental investigation of the photoluminescence, under excitation by synchrotron radiation within the absorption band at 7.6 eV , induced in γ-irradiated α-quartz. Two emissions centered at 4.9 and 2.7 eV are observed at low temperature: the former decreases above 40 K , whereas the second band exhibits an initial slight increase and its quenching is effective above 100 K . Furthermore, the decay kinetics of both emissions occur in a time scale of nanoseconds: at T=17.5 K we measured a lifetime τ∼1.0 ns for the photoluminescence at 4.9 eV and τ∼3.6 ns for that at 2.7 eV . These results give new insight on the optical properties associated with defects peculiar of crystalline matrix, also on the basis of their comparison with previous studies on silica.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-08-01 |