Crystal growth and scintillation properties of Tm:K2NaLuF6
Crystal growth and scintillation properties of Tm:K2NaLuF6
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DOI：
10.1016/j.optmat.2009.12.004
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发表时间：
2010-03
影响因子：
3.9
通讯作者：
Naoto Abe;T. Yanagidaa;Yuui Yokotaa;S. Maeo;J. Pejchal;Y. Fujimoto;Yuuki Furuya;Hidehiko Tanaka;N. Kawaguchi;K. Fukuda;V. Chani;K. Kamada;M. Nikl;A. Yoshikawa
中科院分区：
文献类型：
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作者：
Naoto Abe;T. Yanagidaa;Yuui Yokotaa;S. Maeo;J. Pejchal;Y. Fujimoto;Yuuki Furuya;Hidehiko Tanaka;N. Kawaguchi;K. Fukuda;V. Chani;K. Kamada;M. Nikl;A. Yoshikawa
采用微拉下（μ-PD）法制备了化学稳定、透明的掺杂Tm3+的k2naluf6单晶。x射线衍射测量表明，生长晶体具有立方结构，具有Fm3m空间群。在真空紫外区（VUV）和紫外区（UV）测量了生长晶体的射电光谱和光发光光谱。Tm: k2naluf6在188nm处显示出较高的发射强度（λexc=159nm）。用241am 5.5MeV α-射线辐照研究了Tm: k2naluf6的衰变时间和光产率。衰变时间的主要成分为4-8μs，此发射被认为是4fn−15d高自旋态（允许宇称和禁止自旋跃迁）的5d-4f发射。此外，随着Tm浓度的增加，掺杂k2naluf6单晶的光产率有系统地增加。
Chemically stable and transparent K2NaLuF6single crystals doped with Tm3+ions were grown by the micro-pulling down method (μ-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:K2NaLuF6showed high emission intensity at 188nm in the radio- and photo-luminescence spectra (λexc=159nm). The decay time and light yield of Tm:K2NaLuF6were also investigated by241Am 5.5MeV α-ray irradiation. The main component of the decay time was a 4–8μs and this emission was considered as 5d–4f emission from 4fn−15d high-spin state (parity allowed and spin forbidden transition). In addition to this, the light yield of Tm-doped K2NaLuF6single crystals systematically increased with increasing Tm concentration.