Author/Authors :
Fujimoto، نويسنده , , Yutaka and Yanagida، نويسنده , , Takayuki and Yokota، نويسنده , , Yuui and Kawaguchi، نويسنده , , Noriaki and Fukuda، نويسنده , , Kentaro and Totsuka، نويسنده , , Daisuke and Watanabe، نويسنده , , Kenichi and Yamazaki، نويسنده , , Atsushi and Chani، نويسنده , , Valery and Yoshikawa، نويسنده , , Akira، نويسنده ,
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 :
Pb2+ 1S0?3P0 , Neutron scintillator , 1 transition , Micro-pulling-down (?-PD) , Lanthanide oxyborate
