OSL response of α-Al2O3: C, Mg exposed to beta and UVC radiation: A comparative investigation

Abstract:

Continuous wave optically stimulated luminescence (CW-OSL) of an Al 2 O 3: C, Mg single crystal was investigated after irradiation with ultraviolet C radiation (UVC; peak emission at 254 nm) as well as with a beta source under different doses (100 mGy–3 Gy). Analysis of the OSL decay curves provided experimental evidence that: i) UVC-and beta-irradiated Al 2 O 3: C, Mg single crystal showed similar OSL decay curves, and that ii) a same fast (τ~ 2.9 s) and a same slow (τ~ 29 s) components were identified in the OSL decay curves for both types of radiation. On the other hand, analysis of the results suggested that radiation type generated distinct initial concentration of charges trapped at these two traps. The differences in the OSL decay curves were attributed either to differences in the initial population of the traps or to a balance of trapping-detrapping during UV irradiation.

Año de publicación:

2021

Keywords:

Fuente:

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