Dosimetric properties of rare earth doped LiCaBO3 thermoluminescence phosphors
| Autor: | O. Annalakshmi, V. Ramasamy, S.R. Anishia, V. Ponnusamy, M.T. Jose |
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| Rok vydání: | 2010 |
| Předmět: |
Photoluminescence
Doping Biophysics Analytical chemistry chemistry.chemical_element Phosphor General Chemistry Condensed Matter Physics Biochemistry Thermoluminescence Atomic and Molecular Physics and Optics chemistry.chemical_compound Thulium chemistry Lithium Irradiation Calcium borate Nuclear chemistry |
| Zdroj: | Journal of Luminescence. 130:1834-1840 |
| ISSN: | 0022-2313 |
| Popis: | Lithium Calcium borate (LiCaBO3) polycrystalline thermoluminescence (TL) phosphor doped with rare earth (RE3+) elements has been synthesized by high temperature solid state diffusion reaction. The reaction has produced a very stable crystalline LiCaBO3:RE3+ phosphors. Among these RE3+ doped phosphors thulium doped material showed maximum TL sensitivity with favorable glow curve shape. TL glow curve of gamma irradiated LiCaBO3:Tm3+ samples had shown two major well-separated glow peaks at 230 and 430 °C. The glow peak at 430 °C is almost thrice the intensity of the glow peak at 230 °C. The TL sensitivity of the phosphor to gamma radiation was about eight times that of TLD-100 (LiF). Photoluminescence and TL emission spectra showed the characteristic Tm3+ peaks. TL response to gamma radiation dose was linear up to 103 Gy. Post-irradiation TL fading on storage in room temperature and elevated temperatures was studied in LiCaBO3:Tm3+ phosphor. |
| Databáze: | OpenAIRE |
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