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P‐146: Thermoluminescence Spectra of MgO Poly‐Crystals Exposed to Vacuum Ultraviolet (VUV) Radiation
Author(s) -
Shao Qiyue,
Tolner Harm,
Li Huijuan,
Kuang Yawei,
Li Qing,
Dong Yan,
Jiang Jianqing
Publication year - 2008
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3069515
Subject(s) - thermoluminescence , materials science , doping , analytical chemistry (journal) , excited state , photoluminescence , radiation , ultraviolet , emission spectrum , spectral line , atomic physics , luminescence , optoelectronics , optics , chemistry , physics , chromatography , astronomy
A comparative study of photoluminescence and thermoluminescence for both pure and doped MgO poly‐crystals has been performed. for pure MgO, a red emission band at 730nm can be observed under VUV light excitation. The doped MgO exhibits a strong emission at 650 nm excited by the VUV or 250 nm light. After exposure to VUV radiation, a strong TL peak corresponding to red emission band can be detected in the temperature range of 20°C–250°C for both doped and undoped MgO. Using Hoogenstraaten's heating rate method, a trap depth of 0.31 eV can be obtained for pure MgO. The trap depth in doped MgO is about 0.51 eV and shifts to high energy level due to the addition of the doping element.