Photo-transferred thermoluminescence of shallow traps in beta-irradiated BeO ceramics

Date

2017-07-01

Author

Isik, M.
Bulur, Enver
Hasanlı, Nızamı

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Photo-transferred thermoluminescence signals from beryllium oxide (BeO) ceramics were measured in the low temperature range of 10-300 K. Samples irradiated at room temperature using a Sr-90/Y-19 beta source were cooled down to 10 K and trapped charges were photo-transferred at this low temperature using the light from a high power blue LED emitting at similar to 470 nm (2.6 eV). Thermoluminescence glow curve recorded at 0.2 K/s heating rate exhibited three peaks around 90, 160 and 185 K. The analyses of the TL peaks of the glow curve were accomplished using curve fitting, differential and peak shape methods. Results obtained from these techniques are in good agreement about the presence of three trapping centers in BeO ceramics with activation energies of 0.24, 0.48 and 0.56 eV. Moreover, the analyses indicated that first-order kinetics (slow retrapping) is the dominant mechanism in the luminescence process. Heating rate dependence of the glow curves was also investigated between 0.2 and 0.8 K/s rates.

Subject Keywords

Photo-transferred thermoluminescence, BeO ceramics, Thermoluminescence

URI

https://hdl.handle.net/11511/41617

Journal

JOURNAL OF LUMINESCENCE

DOI

https://doi.org/10.1016/j.jlumin.2017.03.037

Collections

Department of Physics, Article

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Citation Formats

M. Isik, E. Bulur, and N. Hasanlı, “Photo-transferred thermoluminescence of shallow traps in beta-irradiated BeO ceramics,” JOURNAL OF LUMINESCENCE, pp. 290–294, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41617.