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Crystal growth and scintillation characteristics of the Nd doped LiLuF4 single crystals |
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| Authors: | Kentaro Fukuda Noriaki Kawaguchi Sumito IshizuTomohito Nagami Toshihisa SuyamaTakayuki Yanagida Yuui YokotaMartin Nikl Akira Yoshikawa |
| Affiliation: | a Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan b Tokuyama Corporation Shibuya 3-chome, Shibuya-ku, Tokyo 150-8383, Japan c Institute of Physics AS CR, v.v.i., Cukrovarnicka 10, 16253 Prague, Czech Republic d New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan |
| Abstract: | Sixty millimeter diameter single crystal of Nd3+ doped LiLuF4 was successfully grown by the Czochralski technique. No remarkable absorption due to unfavorable impurities was observed from optical absorption measurements in the vacuum ultra-violet spectral region. The high crystallinity and homogeneous luminescence characteristics were found from X-ray rocking curve and cathode-ray luminescence respectively. X-ray excited luminescence spectrum was measured and the significant 4f25d-4f3 luminescence at 182 nm was observed in the grown crystal. The pulse height spectrum was taken upon γ-ray irradiation. As a result, the grown crystals demonstrated sufficient response to the γ-ray showing the light yield of 420 ± 30 photons/MeV. The decay curve under α-ray irradiation was also investigated and described by two component decay kinetics which consists of the decay constants of 34 and 450 ns. |
| Keywords: | Fluoride Single crystal Scintillator VUV Nd3+ 5d-4f Crystal growth from the melt |
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