Luminescence Properties of High Y3+-doped Ce:Li6Lu(BO3)3 Scintillators

doi:10.3724/SP.J.1077.2013.12735

Abstract

Abstract: To decrease the high effective atomic number (Z_eff) of Ce:Li₆Lu(BO₃)₃ crystal, Y³⁺, which has a lower atomic number, is introduced to substitute Lu³⁺. The Ce:Li₆Lu_1-xY_x(BO₃)₃(0≤x≤1) solid solutions were prepared by the solid-state synthesis method. Based on the X-ray powder diffraction (XRD) analysis, Ce: Li₆Lu_1-xY_x(BO₃)₃ (0≤x≤1) solid solutions and Li₆Gd(BO₃)₃ crystal have the similar XRD patterns and belong to the space group P2_1/c. The luminescence intensity of X-ray stimulated luminescence (XSL) spectrum of Ce:Li₆Lu_1-xY_x(BO₃) (0≤x≤1) decreases with the increasing of the content of Y³⁺. In the case of x=0.5, the Z_eff of Ce:Li₆Lu_0.5Y_0.5(BO₃)₃ is similar to that of Ce:Li₆Gd(BO₃)₃, while the luminescence intensity of Ce:Li₆Lu_0.5Y_0.5(BO₃)₃ is as much as 1.4 times of Ce:Li₆Gd(BO₃)₃. The XSL and PL spectra of Ce:Li₆Lu_0.5Y_0.5(BO₃)₃ indicate that the emission band around 400?nm can be fitted into two peaks, 391 nm and 419 nm, which correspond to the electronic transition from 5d energy level to ²F_5/2 and ²F_7/2 of Ce³⁺ ions, respectively. The decaying time of Ce:Li₆Lu_0.5Y_0.5(BO₃)₃ is about 19.6 ns. When x=0.50-0.70, Ce:Li₆Lu_1-xY_x(BO₃)₃(0≤x≤1) is suitable for using as neutron detection material.

Key words: solid-state synthesis, Ce:Li₆Lu_1-xY_x(BO₃)₃, X-ray stimulated luminescence spectrum, PL spectrum, decay time

CLC Number:

O734

SUN Dan-Dan, PAN Shang-Ke, REN Guo-Hao, WU Yun-Tao, SHANG Shan-Shan, ZHANG Guo-Qing. Luminescence Properties of High Y³⁺-doped Ce:Li₆Lu(BO₃)₃ Scintillators[J]. Journal of Inorganic Materials, 2013, 28(9): 987-991.

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Luminescence Properties of High Y³⁺-doped Ce:Li₆Lu(BO₃)₃ Scintillators

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