Gamma induced thermoluminescence and color centers study of Dy doped LiF micro-cubes |
| |
| Affiliation: | 1. Centre for Material Science & Engineering, National Institute of Technology (NIT), Hamirpur, Himachal Pradesh, India;2. Department of Physics, National Institute of Technology (NIT), Hamirpur, Himachal Pradesh, India;3. Department of Physics, Amity School of Applied Sciences, Amity University Haryana, Gurgaon, India;4. Beant College of Engineering and Technology (BCET), Gurdaspur, Punjab, India;5. Govt. Degree College, Sujanpur -Tihra, Himachal Pradesh, India;1. Nara Institute of Science and Technology (NAIST), 8916-5, Takayama-cho, Ikoma-shi, Nara, 630-0192, Japan;2. Tokuyama Corporation, Shibuya 3-chome, Shibuya-ku, Tokyo, 150-8383, Japan;1. Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan;2. Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan;1. Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia;2. Sciences Faculty for Girls, King Abdulaziz University, Jeddah 21589, Saudi Arabia;3. Department of Aeronautical Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma-shi, Nara, 630-0192, Japan;2. Tokuyama Corporation, 1-1 Mikage-cho, Shunan-shi, Yamaguchi, 745-8648, Japan;1. College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China;2. College of Chemistry & Biology and Environmental Engineering, Xiangnan University, Chenzhou 423043, China;3. Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, Chenzhou 423043, China;4. Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002, China |
| |
| Abstract: | In this paper, we present the thermoluminescence and optical absorption studies of Dy-doped LiF phosphors. The phosphors were synthesized via co-precipitation method, in which the reactions were carried out at fixed pH value 8.00. X-ray diffraction (XRD) patterns revealed single phase structure of phosphors up to concentration (0.04 mol%) of Dy in the host lattice of LiF. The field emission scanning electron microscope (FE-SEM) images showed micro-cubical morphologies. The incorporation of Dy in LiF was confirmed from the results of electron dispersive spectroscopy (EDS) and XRD. The thermoluminescence (TL) glow curves of γ-irradiated samples in the dose range (0.1–50 kGy) revealed a main dosimetric glow peak positioned at 417 K. Moreover, at irradiation dose of 10 kGy and above, a broad TL band towards higher temperature side of main dosimetric peak also appeared. Using TLanal program, the complex TL glow curves were deconvoluted and TL kinetics parameters namely; the activation energies, frequency factors and order of kinetics were evaluated. The results revealed the formation of additional localized trapping sites of different values of activation energy and frequency factor in the forbidden band. The optical absorption study revealed the formation of radiation induced stable color centers (CCs) at room temperature. The concentrations of CCs were evaluated using Smakula's formula. |
| |
| Keywords: | LiF Phosphors Irradiation Thermoluminescence Color centers |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
