More on the TR-OSL signal from BeO ceramics

Time Resolved Optically Stimulated Luminescence (TR-OSL) from BeO ceramics was investigated using blue (445 nm) and near-IR light (852 nm) for stimulation. Stimulation spectrum of the TR-OSL signal – as measured in the interval 700 to 420 nm- was observed to increase monotonically with the decreasin...

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Bibliographic Details
Published in:Radiation measurements 2014-07, Vol.66, p.12-20
Main Author: Bulur, Enver
Format: Article
Language:English
Subjects:
BeO ceramics
Ceramics
Decay
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochronology
Heating
Infrared radiation
Isotope geochemistry. Geochronology
Luminescence
Luminescence dosimetry
Optically Stimulated Luminescence (OSL)
Stimulation
Temperature dependence
Thermal quenching
Time resolved
Time resolved OSL (TR-OSL)
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Summary:Time Resolved Optically Stimulated Luminescence (TR-OSL) from BeO ceramics was investigated using blue (445 nm) and near-IR light (852 nm) for stimulation. Stimulation spectrum of the TR-OSL signal – as measured in the interval 700 to 420 nm- was observed to increase monotonically with the decreasing stimulation wavelength. In addition to the “fast” and “slow” components observed with blue light stimulation, IR stimulated TR-OSL spectra of irradiated BeO ceramics were observed to have two components with average lifetimes around ∼2.5 μs and ∼17 μs. Emission spectra of the both IR stimulated TR-OSL components were observed to have a broad emission band peaking around 330 nm. Thermal stability of the IR stimulated TR-OSL signal was studied by making preheating experiments in the range from 100 °C to 190 °C. It was observed that the IR stimulated OSL signal is stable up to ∼150 °C and decay afterwards. Radiation dose response of the IR stimulated luminescence signal was obtained in the range from 5 to 500 Gy. Both blue and IR stimulated TR-OSL signals grew up to 100 Gy and exhibited saturation for higher doses. Additionally, measurement temperature dependence of the components was also investigated and for the ∼2 μs component thermal assistance with activation energy around 0.16 eV was observed. It seems that the fast component of the blue stimulated TR-OSL component can be correlated to the ∼2 μs IR stimulated TR-OSL component. •IR Stimulated Time-Resolved OSL from BeO was studied.•Two components with lifetimes ∼2 and ∼17us were observed.•IR stimulated TR-OSL signal is found to be stable up to 150 °C.•Thermal quenching energy of the 2us component was found as 0.16 eV.
ISSN:1350-4487
1879-0925
DOI:10.1016/j.radmeas.2014.04.018