title: The effect of Mg, Cu and P impurities on dose response of LiF:Mg,Cu,P phosphors: simulation versus experiments.
abstract: In this research, the effect of magnesium (Mg), copper (Cu) and phosphorus (P) impurities on dosimetry response of LiF:Mg,Cu,P phosphors is studied experimentally and by the simulation procedure. In the experimental procedure, LiF:Mg,Cu,P phosphors in the powder form were synthesised by chemical co-precipitation method. After annealing at 250°C for 10 min, known amounts of powder were exposed to gamma doses from 0.2 to 1 Gy. The activation energy of the electronic traps for the dosimetric peak at 150°C in LiF:Mg,Cu,P crystalline lattice obtained was 0.69 eV. In the simulation study, the role of stated dopants on electronic and structural properties of LiF crystalline lattice is investigated with the WIEN2 K Code. The activation energies of the electronic and hole traps for the dosimetric peak at the same temperature in LiF:Mg,Cu,P crystalline lattice obtained are 0.75 and 3.1 eV, respectively. It is shown that the experimental results are in agreement with simulation results.
authors: Malek Ashtar University, Tehran, Iran.
authors: Kheirollah
authors: K
authors: Mohammadi
authors: Energy Engineering and Physics Department, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran khayat@aut.ac.ir.
authors: Omid
authors: O
authors: Khayat
authors: Energy Engineering and Physics Department, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran.
authors: Hossein
authors: H
authors: Afarideh
mesh_terms: D003198:Computer Simulation; D003300:Copper / Q000032:analysis*; D004581:Electronics; D005459:Fluorides / Q000032:analysis*; D005720:Gamma Rays; D018020:Lithium Compounds / Q000032:analysis*; D008163:Luminescent Measurements; D008274:Magnesium / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D010758:Phosphorus / Q000032:analysis*; D011208:Powders; D012995:Solubility; D013696:Temperature; D013819:Thermoluminescent Dosimetry / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D018020:Lithium Compounds; D011208:Powders; C027651:lithium fluoride; D010758:Phosphorus; D003300:Copper; D008274:Magnesium; D005459:Fluorides