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Crystal growth and scintillation properties of Tm:K2NaLuF6

โœ Scribed by Naoto Abe; Takayuki Yanagidaa; Yuui Yokotaa; Shuji Maeo; Jan Pejchal; Yutaka Fujimoto; Yuuki Furuya; Hidehiko Tanaka; Noriaki Kawaguchi; Kentaro Fukuda; Valery Chani; Kei Kamada; Martin Nikl; Akira Yoshikawa

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
674 KB
Volume
32
Category
Article
ISSN
0925-3467

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โœฆ Synopsis

Chemically stable and transparent K 2 NaLuF 6 single crystals doped with Tm 3+ ions were grown by the micro-pulling down method (l-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:K 2 NaLuF 6 showed high emission intensity at 188 nm in the radio-and photo-luminescence spectra (k exc = 159 nm).

The decay time and light yield of Tm:K 2 NaLuF 6 were also investigated by 241 Am 5.5 MeV a-ray irradiation. The main component of the decay time was a 4-8 ls and this emission was considered as 5d-4f emission from 4f n ร€ 1 5d high-spin state (parity allowed and spin forbidden transition). In addition to this, the light yield of Tm-doped K 2 NaLuF 6 single crystals systematically increased with increasing Tm concentration.

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