摘要
We investigated photoluminescence （PL） and scintillation properties of Ce3＋-doped Y3A12Ga3OI2 （Ce：YAGG） trans- parent ceramics synthesized by vacuum sintering with different Ce3＋ concentrations （mol.%） from 0.3% to 1% （0.3%Ce：YAGG, 0.5%Ce：YAGG, 0.8%Ce：YAGG and I%Ce：YAGG）. The samples were synthesized by the vacuum sintering technique. The obtained samples showed a very strong and broad PL emission by the 5dl-4f transition of Ce3＋ in the wavelength range from 470 to 600 nm. The PL decay profiles were approximated by a single exponential decay function with the time constants of around 33-39 ns, Fur- thermore, the scintillation spectra induced by X-rays showed similar features with those observed in PL. The scintillation decay time profiles followed a second-order exponential decay function. The fast component group （ranged 3542 ns） were dominantly contrib- uted by the 5d1-4f transition of Ce3＋. The pulse height spectra utilizing the latter emissions showed a clear photoabsorption peak. Among those samples tested, 0.5%Ce：YAGG sample showed the highest scintillation light yield of 21,400 ph/MeV under 13VCs y-ray irradiation.
We investigated photoluminescence （PL） and scintillation properties of Ce3＋-doped Y3A12Ga3OI2 （Ce：YAGG） trans- parent ceramics synthesized by vacuum sintering with different Ce3＋ concentrations （mol.%） from 0.3% to 1% （0.3%Ce：YAGG, 0.5%Ce：YAGG, 0.8%Ce：YAGG and I%Ce：YAGG）. The samples were synthesized by the vacuum sintering technique. The obtained samples showed a very strong and broad PL emission by the 5dl-4f transition of Ce3＋ in the wavelength range from 470 to 600 nm. The PL decay profiles were approximated by a single exponential decay function with the time constants of around 33-39 ns, Fur- thermore, the scintillation spectra induced by X-rays showed similar features with those observed in PL. The scintillation decay time profiles followed a second-order exponential decay function. The fast component group （ranged 3542 ns） were dominantly contrib- uted by the 5d1-4f transition of Ce3＋. The pulse height spectra utilizing the latter emissions showed a clear photoabsorption peak. Among those samples tested, 0.5%Ce：YAGG sample showed the highest scintillation light yield of 21,400 ph/MeV under 13VCs y-ray irradiation.
