Scintillation and optical properties of Ce-doped YAGG transparent ceramics

• Published in: Journal of rare earths Vol. 34; no. 8; pp. 763 - 768
• Main Authors: Mori, Masaki, Xu, Jian, Okada, Go, Yanagida, Takayuki, Ueda, Jumpei, Tanabe, Setsuhisa
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2016
• Subjects: cerium; Ce掺杂; photoluminescence; rare earths; scintillation; transparent ceramic; YAGG; γ射线照射; 光学性质; 光致发光; 烧结合成; 衰减函数; 透明陶瓷; 闪烁性能; YAGG; scintillation; photoluminescence; cerium; transparent ceramic; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/s1002-0721(16)60091-1

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.