Characterization of ferrous-methylthymol blue-polyvinyl alcohol gel dosimeters using nuclear magnetic resonance and optical techniques

Does the gelation temperature or the sulfuric acid concentration influence the dosimetric properties of radiochromic PVA-GTA Xylenol Orange Fricke gels?

“…In an attempt to improve the dosimeter, poly(vinyl alcohol) (PVA) cross-linked by glutaraldehyde (GTA) was recently introduced as a matrix for the preparation of Fricke gels (Jin et al, 2012;Ruijia et al, 2010;d'Errico et al, 2017;Marini et al, 2017;Marrale et al, 2017;Boase et al, 2018;Smith et al, 2015;Gallo et al, 2019;Collura et al, 2018;Gallo et al, 2017;Eyadeh et al, 2018b;Rabaeh et al, 2018). PVA cross-linked with GTA is a hydrogel that, due to its crosslinks within the polymeric chains, absorb and retain large amount of water but do not dissolve in aqueous solutions (Hennink and van Nostrum, 2012).…”

Improved Dose Response of N-(hydroxymethyl)acrylamide Gel Dosimeter with Calcium Chloride for Radiotherapy

“…New developments in radiotherapy have been concerned with the study of equivalent gel dosimeters for tissues containing active chemical sensors to measure the absorbed radiation dose [ 1 , 2 , 3 , 4 , 5 , 6 ]. Gel dosimeters such as polymer gels have a range of properties like biological tissues, and are suitable alternatives compared with conventional dosimeters due to their ability in resolving three-dimensional (3D) dose distributions [ 7 , 8 , 9 , 10 , 11 ].…”

Variation in dose response of three dosimetry systems based on diphenyl thiocarbazone

“…During the duration of the period, numerous types of dosimeters are utilized for a variety of purposes, including dyed polymeric thin plastic film dosimeters, which have been widely applied [5][6][7][8][9][10][11]. Liquid dosimeters [12][13][14][15][16][17][18], gel dosimeters [19][20][21][22] and EPR dosimeters [23][24][25]. Upon exposure to irradiation, the physical and chemical properties of the polymers change in the case of films, accordingly due to induced cross-links, chain detachments and formation of new chemical bonds [26].…”