Luminescence and low temperature trap centers in mixed rare earth borate crystal  

作　　者：D.Joseph Danie Indra Raj Panday H.J.Kim Sunghwan Kim U.Fawad 

机构地区：[1]Department of Physics,Kyungpook National University [2]Department of Radiological Science, Cheongju University [3]Department of Physics, Kohat University of Science and Technology

出　　处：《Journal of Rare Earths》2018年第10期1024-1029,共6页稀土学报（英文版）

基　　金：Project supported by the National Research Foundation of Korea(NRF) funded by the Ministry of Science and Technology,Korea(MEST)(NRF2017M2A8A4018678)

摘　　要：The single crystal of this compound has been grown from melt by using a conventional Czochralski technique. The temperature dependent luminescence spectra were measured using a 265 nm laser as an exciting source in the range of 10-300 K. The scintillation decay time profile was measured and found to have three components. The influence of the trap centers on the luminescence properties was studied by means of thermoluminescence（TL） glow peak analysis. Low temperature TL glow peaks were measured in the temperature range of 10-300 K at the heating rate of 0.1 K/s for X-ray irradiated sample. The TL glow peak consists of two dominant peaks at 88 and 109 K. Several glow peaks with a complex nature causes the decrease in the light yield at temperatures below 250 K, and along with long scintillation decay components were observed. The trap parameters such as activation energy（E）, frequency factor（s）and order of kinetics（b） were calculated using various standard methods such as peak shape（PS）,variable heating rate（VHR）, initial rise（IR） and computerized glow curve deconvolution（CGCD）.The single crystal of this compound has been grown from melt by using a conventional Czochralski technique. The temperature dependent luminescence spectra were measured using a 265 nm laser as an exciting source in the range of 10-300 K. The scintillation decay time profile was measured and found to have three components. The influence of the trap centers on the luminescence properties was studied by means of thermoluminescence（TL） glow peak analysis. Low temperature TL glow peaks were measured in the temperature range of 10-300 K at the heating rate of 0.1 K/s for X-ray irradiated sample. The TL glow peak consists of two dominant peaks at 88 and 109 K. Several glow peaks with a complex nature causes the decrease in the light yield at temperatures below 250 K, and along with long scintillation decay components were observed. The trap parameters such as activation energy（E）, frequency factor（s）and order of kinetics（b） were calculated using various standard methods such as peak shape（PS）,variable heating rate（VHR）, initial rise（IR） and computerized glow curve deconvolution（CGCD）.

关 键 词：Rare earth Decay time THERMOLUMINESCENCE Kinetic parameters 

分 类 号：O734[理学—晶体学]