Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8251317 | Radiation Physics and Chemistry | 2018 | 8 Pages |
Abstract
A new composition of Ferrous sulphate-Metheylthymol blue (MTB)-Polyvinyl alcohol (PVA) dosimeter is introduced in this work and evaluated using nuclear magnetic resonance (NMR) and absorbance spectrophotometry techniques. The Fricke-MTB-PVA dosimeters were irradiated using a medical linear accelerator in a cubic water phantom. The dose response of the dosimeters was investigated using NMR in terms of spin-spin relaxation rate (R2), and ultraviolet and visible regions (UV-Vis) spectrophotometry in terms of absorbance. The dosimeter presents a linear dose response for doses up to 20â¯Gy with UV-Vis and 40â¯Gy with NMR method. The sample with 0.1â¯mM MTB, 5% PVA by weight showed highest dose sensitivity for both techniques. The Fricke-MTB-PVA dosimeter developed in this work has a significant advance over the Fricke-MTB-gelatin system: the NMR sensitivity was remarkably improved; the auto-oxidation rate was seven times lower, and no significant dose rate or photon energy effects were observed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Khalid A. Rabaeh, Molham M. Eyadeh, Tariq F. Hailat, Feras M. Aldweri, Samer M. Alheet, Rania M. Eid,