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.

CANNAS M, AGNELLO S, BOSCAINO R, GELARDI FM, TRUKHIN A (2004). Photoluminescence in gamma-irradiated alpha-quartz investigated by synchrotron radiation. RADIATION MEASUREMENTS, 38(4-6), 507-510 [10.1016/j.radmeas.2003.12.008].

Photoluminescence in gamma-irradiated alpha-quartz investigated by synchrotron radiation

CANNAS, Marco;AGNELLO, Simonpietro;BOSCAINO, Roberto;GELARDI, Franco Mario;
2004-01-01

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.
https://www.sciencedirect.com/science/article/pii/S1350448703003457
CANNAS M, AGNELLO S, BOSCAINO R, GELARDI FM, TRUKHIN A (2004). Photoluminescence in gamma-irradiated alpha-quartz investigated by synchrotron radiation. RADIATION MEASUREMENTS, 38(4-6), 507-510 [10.1016/j.radmeas.2003.12.008].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/9200
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