Open AccessImproved Thermoluminescence Properties of Natural NaCl Salt Extracted From Mediterranean Sea Water Relevant to Radiation Dosimetry
Author(s) -
F. Khamis,
D.E. Arafah
Publication year - 2020
Publication title -
european journal of applied physics
Language(s) - English
Resource type - Journals
ISSN - 2684-4451
DOI - 10.24018/ejphysics.2020.2.3.8
Subject(s) - thermoluminescence , annealing (glass) , seawater , dosimetry , materials science , thermoluminescent dosimeter , irradiation , analytical chemistry (journal) , frequency factor , effective atomic number , radiochemistry , activation energy , chemistry , luminescence , dosimeter , atomic physics , atomic number , nuclear medicine , optoelectronics , physics , environmental chemistry , nuclear physics , medicine , oceanography , composite material , geology , organic chemistry
Thermoluminescence (TL) technique has been used to characterize and determine the dosimetric properties of natural sodium chloride (NaCl) salt extracted from the Seawater of the Mediterranean Sea. The TLD grade material was prepared by evaporation and annealing the powder obtained from the aqueous solution. The TL properties include the response to theb-irradiation dose and the effects resulting from annealing up to 700oC, heating rate and fading. The analysis involve using total Glow Curve Deconvolution (GCD) to separate the inherent overlapping TL-peaks and determine the TL characteristics and the trapping parameters using general order (GO)kinetics (activation energy, kinetic order, peak position of trap and the frequency factor). The GL-curves exhibit well defined TL-peaks around 140oC, 225oC and 380oC and response depending on the annealing temperature due to variations due to formation of the structural defects. A linear response was noticed over the delivered range of absorbed doses up to 4Gy. The fading results gave evidence that TL emission is due to a redistribution of trapping levels and indicate that the prominent TL-peak near 225oCis useful for TL-dosimetric applications.