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Scintillation and optical properties of Pb-doped YCa4O(BO3)3 crystals |
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| Authors: | Yutaka Fujimoto Takayuki YanagidaYuui Yokota Noriaki KawaguchiKentaro Fukuda Daisuke TotsukaKenichi Watanabe Atsushi YamazakiValery Chani Akira Yoshikawa |
| Affiliation: | a IMRAM, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan b JSPS, 8 Ichibanmachi, Chiyoda-ku, Tokyo 102-8472, Japan c NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan d Tokuyama Corporation, 3 Shibuya Shibuya-ku, Tokyo 150-8383, Japan e Nihon Kessho Kogaku Co., Ltd., 810-5 Nobe-cho Tatebayashi Gunma, Japan f Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan |
| Abstract: | This communication reports optical properties and radiation responses of Pb2+ 0.5 and 1.0 mol%-doped YCa4O(BO3)3 (YCOB) single crystals grown by the micro-pulling-down (μ-PD) method for neutron scintillator applications. The crystals had no impurity phases according to the results of X-ray powder diffraction. These Pb2+-doped crystals demonstrated blue-light luminescence at 330 nm because of Pb2+1S0-3P0,1 transition in the photoluminescence spectra. The main emission decay component was determined to be about 250-260 ns under 260 nm excitation wavelength. When irradiated by a 252Cf source, the relative light yield of 0.5% Pb2+-doped crystal was about 300 ph/n that was determined using the light yield of a reference Li-glass scintillator. |
| Keywords: | Neutron scintillator Lanthanide oxyborate Pb2+1S0&minus 3P0 1 transition Micro-pulling-down (μ-PD) |
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