Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10156560 | Applied Radiation and Isotopes | 2018 | 15 Pages |
Abstract
In this work, Eu, Nd co-doped MAl2O4:Eu, Nd (Mâ¯=â¯Ca, Sr, Ba) phosphors were synthesized at low temperatures (550â¯Â°C) by the combustion method. The crystallinity of the phosphors was monitored by X-ray diffraction (XRD) and the morphology was examined by scanning electron microscope (SEM). Synthesis of phosphors, the effect of lanthanide concentrations on light emission intensity and duration investigated by using photoluminescence (PL) measurements. Narrow orange-red emissions from 500 to 750â¯nm in the PL spectra are assigned to 5D0 â 7Fj (jâ¯=â¯0,1,2,3,â¦) transitions of Eu3+ ion. In contrast, the broad luminescence band of the samples in the range of 400-500â¯nm are attributed to the 5d-4â¯f transitions of Eu3+ ion in the same host materials. Investigated the effects of radiation on the severity of the trap depths of these structures. The decay curves of these phosphors show how long the phosphors are attenuated. Thermoluminescence (TL) glow curves have been recorded from room temperature to 300â¯Â°C at a constant heating rate of 1â¯Â°C/s after preheat process at 130â¯Â°C for 10â¯s using lexsyg smart TL/OSL reader. Nd3+ trap levels can be thought of as the lanthanide element that causes long composition in the phosphorescence structure at room temperature.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Y.Z. Halefoglu, M. Yüksel, H. Derin, N. Can, M. Topaksu, E. Ozturk, E. KaracaoÄlu,