Photoluminescence, scintillation and thermally-stimulated luminescence properties of Tb-doped 12CaO•7Al2O3 single crystals grown by FZ method

被引：18
作者：
Kumamoto, Narumi [1 ]
Nakauchi, Daisuke [1 ]
Kato, Takumi [1 ]
Okada, Go [1 ]
Kawaguchi, Noriaki [1 ]
Yanagida, Takayuki [1 ]
机构：
[1] Nara Inst Sci & Technol NAIST, Grad Sch Mat Sci, 8916-5 Takayama Cho, Ikoma, Nara 6300192, Japan
来源：
JOURNAL OF RARE EARTHS | 2017年 / 35卷 / 10期
关键词：
C12A7; single crystal; FZ; terbium; scintillation; photoluminescence; TSL; rare earths; ENERGY-TRANSFER; EU; HO; SM; DY; LN; BEHAVIOR; OXIDE; IONS; ER;
D O I：
10.1016/S1002-0721(17)60999-2
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Tb-doped 12CaO center dot 7Al(2)O(3)(Tb:C12A7) crystals were synthesized by the floating zone (FZ) method and the photoluminescence (PL), scintillation and thermally-stimulated luminescence (TSL) properties were investigated. The photoluminescence (PL) emission spectra and PL decay time profiles were investigated by using Quantaurus-tau (Hamamatsu). The scintillation spectra and decay time profiles were measured by using our laboratory-constructed set-up under X-ray irradiation. Finally, TSL glow curve was measured by using Nanogray TL-2000 with the heating rate of 1 degrees C/s. In PL and scintillation, emission peaks were observed at 493, 543, 587 and 620 nm due to the 4f-4f transitions of Tb3+. Decay time constants of the emission by PL and scintillation appeared to be different, and the measured values were approximately 2.4 and 1.9 ms, respectively. After X-ray irradiations, the 0.5% (all Tb contents in this paper are in mole fraction) and 1.0% Tb-doped samples showed a single intense and broad glow peak around 100 degrees C while 1.2%-1.5% Tb-doped samples showed notable additional peak around 250 degrees C.
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收藏
页码：957 / 963
页数：7
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