Crystal growth and scintillation properties of Tm:K2NaLuF6

被引:13
作者
Abe, Naoto [1 ]
Yanagidaa, Takayuki [1 ]
Yokotaa, Yuui [1 ]
Maeo, Shuji [1 ]
Pejchal, Jan [1 ,2 ]
Fujimoto, Yutaka [1 ]
Furuya, Yuuki [1 ]
Tanaka, Hidehiko [1 ]
Kawaguchi, Noriaki [3 ]
Fukuda, Kentaro [3 ]
Chani, Valery [1 ]
Kamada, Kei [1 ,4 ]
Nikl, Martin [2 ]
Yoshikawa, Akira [1 ,5 ]
机构
[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] AS CR, Inst Phys, VVI, Prague 16253, Czech Republic
[3] Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
[4] Furukawa Co Ltd, Tsukuba, Ibaraki 3050856, Japan
[5] Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
关键词
Fluoride; Single crystal; Crystal growth from the melt; Tm3+ radiation; Scintillator; PULLING-DOWN METHOD; CROSS-LUMINESCENCE; VUV; TRANSITIONS; ND3+; IONS; CE;
D O I
10.1016/j.optmat.2009.12.004
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Chemically stable and transparent K2NaLuF6 single crystals doped with Tm3+ ions were grown by the micro-pulling down method (mu-PD). X-ray diffraction measurements showed that the as-grown crystals possess cubic structure with Fm3m space group. The radio- and photo-luminescence spectra of the grown crystals were measured in the vacuum ultraviolet (VUV) and ultraviolet (UV) regions. Tm:K2NaLuF6 showed high emission intensity at 188 nm in the radio- and photo-luminescence spectra (lambda(exc) = 159 nm). The decay time and light yield of Tm:K2NaLuF6 were also investigated by Am-241 5.5 MeV alpha-ray irradiation. The main component of the decay time was a 4-8 mu s and this emission was considered as 5d-4f emission from 4f(n - 1)5d high-spin state (parity allowed and spin forbidden transition). In addition to this, the light yield of Tm-doped K2NaLuF6 single crystals systematically increased with increasing Tm concentration. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:589 / 594
页数:6
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