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

Date

2017-07-01

Author

Isik, M.
Bulur, Enver
Hasanlı, Nızamı

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

130
views

0
downloads

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

Suggestions

OpenMETU
Core

Characteristic features of thermoluminescence in neodymium-doped gallium sulfide Güler, Işıkhan; Ahmedova, F.; Guseinov, A.; Hasanlı, Nızamı (2018-06-01) The thermoluminescence (TL) of neodymium-doped gallium sulfide (GaS:Nd) single crystals was measured from 10 K to room temperature with various heating rates between 0.2 and 1.0 K/sec. Two peaks centered at 70.9 K and 116.0 K were observed when using a heating rate of 0.8 K/sec. Initial rise and curve fitting methods were used to obtain information on trap activation energies. Activation energies of 94 and 216 meV were found for two analyzable peaks. The heating rate dependencies of TL intensities revealed ...
Photo-transferred luminescence from BeO ceramics Bulur, Enver (2007-03-01) Temperature and radiation dose dependences of the thermoluminescence, photo-transferred luminescence signals from BeO ceramics were investigated using blue-green stimulation (420-550 nm). Several deep traps that act as sources for the photo-transferred luminescence signals, located in 400-625 degrees C region of the TL glow curve, were distinguished.
Defect characterization of Ga4Se3S layered single crystals by thermoluminescence IŞIK, MEHMET; Delice, S.; Hasanlı, Nızamı (2016-04-01) Trapping centres in undoped Ga4Se3S single crystals grown by Bridgman method were characterized for the first time by thermoluminescence (TL) measurements carried out in the low-temperature range of 15-300 K. After illuminating the sample with blue light (similar to 470 nm) at 15 K, TL glow curve exhibited one peak around 74 K when measured with a heating rate of 0.4 K/s. The results of the various analysis methods were in good agreement about the presence of one trapping centre with an activation energy of...
Characterization of trap centers in Gd2O3 nanoparticles by low temperature thermoluminescence measurements Delice, S.; IŞIK, MEHMET; Hasanlı, Nızamı (2018-01-01) Trapping centers in Gd2O3 nanoparticles were investigated using thermoluminescence (TL) measurements in the below room temperature region of 10-280 K. Seven peaks having peak maximum temperatures between 30 and 252 K were observed in the TL spectra measured at constant heating rate of 0.3 K/s. Activation energies, order of kinetics and frequency factors were reported using three different analysis techniques: curve fitting, initial rise and peak shape methods. Activation energies of the trapping centers wer...
Thermoluminescence properties of ZnO nanoparticles in the temperature range 10-300 K IŞIK, MEHMET; YILDIRIM, TACETTİN; Hasanlı, Nızamı (2016-04-01) Low-temperature thermoluminescence (TL) properties of ZnO nanoparticles grown by sol-gel method were investigated in the 10-300 K temperature range. TL glow curve obtained at 0.2 K/s constant heating rate exhibited one broad peak around 83 K. The observed peak was analyzed using curve fitting method to determine the activation energies of trapping center(s) responsible for glow curve. Analyses resulted in the presence of three peaks at 55, 85 and 118 K temperatures with activation energies of 12, 30 and 45 ...

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.