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Thermoluminescence, optically stimulated luminescence and radioluminescence properties of Al2O3:C,Mg

Radiation Measurements
Publication Date
DOI: 10.1016/j.radmeas.2011.04.026
  • Optically Stimulated Luminescence
  • Radioluminescence
  • Aggregate Defects
  • Al2O3:C
  • Al2O3:C
  • Mg
  • Fcenters


Abstract The objective of this paper is to investigate the basic luminescence properties of enhanced aluminum oxide doped with carbon and magnesium (Al 2O 3:C,Mg), including thermoluminescence (TL), optically stimulated luminescence (OSL), and radioluminescence (RL) to determine its potential for applications in radiation dosimetry. In general, the intensities of the TL, OSL, and RL signals of the Al 2O 3:C,Mg samples are comparable to those of regular carbon-doped aluminum oxide (Al 2O 3:C). The enhanced Al 2O 3:C,Mg samples show the presence of Mg-induced aggregate defects, mainly F 2 2+(2Mg) and F 2 +(2Mg) centers, with emissions at 520 and 750 nm, respectively, in addition to an increased F +-center RL emission at 325 nm when compared to Al 2O 3:C. In Al 2O 3:C,Mg with empty trapping centers, the RL intensity varies less with irradiation time than Al 2O 3:C, showing that the RL sensitivity of Al 2O 3:C,Mg is less dependent on the occupancy of the trapping states than Al 2O 3:C. Doping with Mg also introduces three TL peaks associated with new shallow traps. The main TL peak in Al 2O 3:C,Mg is narrower and shifted to a lower temperature when compared to Al 2O 3:C. The OSL from the Al 2O 3:C,Mg samples was also observed to decay faster than Al 2O 3:C.

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