Ce (3+) doped Y_3Al_5O_(12) (Ce (3+)∶YAG) single crystal is an good scintillator due to its excellent thermal,mechanic and scintillant performances. In this paper,its vacuum ultraviolet and fluorescence spectra using...Ce (3+) doped Y_3Al_5O_(12) (Ce (3+)∶YAG) single crystal is an good scintillator due to its excellent thermal,mechanic and scintillant performances. In this paper,its vacuum ultraviolet and fluorescence spectra using the synchrotron radiation as the excitation source was studied. The ultraviolet-visible excitation and absorption spectra of Ce (3+)∶YAG were also measured. The excitation energy transfer process and the luminescent differences under direct excitation into the 5d bands of Ce (3+) and excitation of valence band in Ce (3+)∶YAG scintillator were studied.展开更多
Spectroscopic properties of Ce-doped yttrium orthoaluminate （Ce：YA1O3 or Ce：YAP） crystals gown by temperature gradient technique （TGT） were investigated, and the effects of the growth conditions on the propertie...Spectroscopic properties of Ce-doped yttrium orthoaluminate （Ce：YA1O3 or Ce：YAP） crystals gown by temperature gradient technique （TGT） were investigated, and the effects of the growth conditions on the properties were analyzed. Methods of optical absorption （OA）, photoluminescence （PL）, photoluminescence decay （PLD）, X-my excited luminescence （XL） and cathodeluminescence （CL） were used in these investigations. The results showed that the absorption band peak at 202,394 and 532 nm originated from F and F^＋ color center induced by the weak reducing growth atmosphere, green emission band near 500 nm derived from Ce3^＋ -Ce^3＋ pairs and band at 650 - 850 nm from some unintentional impurity in crystals.展开更多
文摘Ce (3+) doped Y_3Al_5O_(12) (Ce (3+)∶YAG) single crystal is an good scintillator due to its excellent thermal,mechanic and scintillant performances. In this paper,its vacuum ultraviolet and fluorescence spectra using the synchrotron radiation as the excitation source was studied. The ultraviolet-visible excitation and absorption spectra of Ce (3+)∶YAG were also measured. The excitation energy transfer process and the luminescent differences under direct excitation into the 5d bands of Ce (3+) and excitation of valence band in Ce (3+)∶YAG scintillator were studied.
基金Project supported by the National Natural Science Foundation of China (60607015)
文摘Spectroscopic properties of Ce-doped yttrium orthoaluminate （Ce：YA1O3 or Ce：YAP） crystals gown by temperature gradient technique （TGT） were investigated, and the effects of the growth conditions on the properties were analyzed. Methods of optical absorption （OA）, photoluminescence （PL）, photoluminescence decay （PLD）, X-my excited luminescence （XL） and cathodeluminescence （CL） were used in these investigations. The results showed that the absorption band peak at 202,394 and 532 nm originated from F and F^＋ color center induced by the weak reducing growth atmosphere, green emission band near 500 nm derived from Ce3^＋ -Ce^3＋ pairs and band at 650 - 850 nm from some unintentional impurity in crystals.
