Thermoluminescence of new Al2O3-BeO ceramics after exposure to high radiation doses
| Autor: | S. V. Nikiforov, A. F. Nikiforov, A. N. Kiryakov, D.V. Ananchenko, I. G. Avdyushin |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Range (particle radiation) Radiation Materials science Analytical chemistry High radiation 01 natural sciences Thermoluminescence Tl dosimetry 030218 nuclear medicine & medical imaging Ionizing radiation 03 medical and health sciences 0302 clinical medicine visual_art 0103 physical sciences visual_art.visual_art_medium High doses Ceramic Intensity (heat transfer) |
| Zdroj: | Applied Radiation and Isotopes. 141:15-20 |
| ISSN: | 0969-8043 |
| Popis: | New Al2O3-BeO ceramics were synthesized from alumina nanopowder in BeO crucibles by high-temperature treatment in reducing conditions. It was found that the TL curve of these ceramics is characterized by a dosimetric peak at 520–530 K for a heating rate of 2 K/s. The integrated TL of the peak is not influenced by the heating rate of the samples, unlike that in anion-defective alumina and beryllia crystals. The presence of an energy distribution of the traps which cause dosimetric TL peak is verified by Tm-Tstop and initial rise methods. Linear dependence on dose of the intensity of TL peak at 520–530 K is observed in the 10–300 Gy gamma-dose range. The diversity of TL sensitivity of the ceramic samples synthesized in one cycle does not exceed 10%. The results obtained show that the newly synthesized Al2O3-BeO ceramics are promising materials for TL dosimetry of high doses of ionizing radiation. |
| Databáze: | OpenAIRE |
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