Single Crystal Growth and Co-doping Effects of Lanthanum Substituted Gadolinium Pyrosilicate Scintillator

6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications 2014

Kamada, Kei^1,2 ; Kurosawa, Shunsuke^3 ; Murakami, Rikito^3 ; Yokota, Yuui^1 ; Pejchal, Jan^1 ; Ohashi, Yuji^3 ; Yoshikawa, Akira^1,2,3

New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Sendai

980-8579, Japan^1

CandA Corporation, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai

980-8579, Japan^2

Institute for Material Reseach, Tohoku University, 2-1-1, Sendai

980-8577, Japan^3

关键词: Co-doping effects;    Emission intensity;    Light yield;    PD methods;    Pyrosilicate;    Radioluminescence spectra;    Scintillation decay time;    Scintillation properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/619/1/012034/pdf
DOI  :  10.1088/1742-6596/619/1/012034

来源: IOP

【 摘 要 】

Ca 100, 200, 500, 1000 and 3000 at. ppm co-doped (Ce0.01,La0.3Gd0.69)2Si2O7single crystals were grown by the μ-PD method. Luminescence and scintillation properties such as radioluminescence spectra, light yield and decay time were evaluated. Expected Ce3+4f5d emission have been observed in 350-430nm peaking at 360nm. Emission intensity took maximum at the Ca 100at.ppm co-doped sample and decreased by increasing the Ca concentration. The Ca 100at.ppm co-doped sample showed the highest light yield of around 20,000 photons/MeV. Scintillation decay time was accelerated with increasing Ca concentration. Scintillation decay time of the Ca 0, 100, 200, 1000 and 3000 at. ppm co-doped samples were 66.5ns(21%) 468ns(79%) and 44.0ns(22%) 430ns(78%), respectively.