Does the gelation temperature or the sulfuric acid concentration influence the dosimetric properties of radiochromic PVA-GTA Xylenol Orange Fricke gels?
| Autor: | Marco Gargano, Francesco D'Errico, Salvatore Gallo, Nicola Ludwig, Grazia Gambarini, Simona Argentiere, Luca Ianni, Emanuele Pignoli, Cristina Lenardi, Ivan Veronese |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Vinyl alcohol
Materials science Xylenol orange food.ingredient Diffusion 01 natural sciences Gelatin Glutaraldehyde 030218 nuclear medicine & medical imaging 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine food Dosimetry Fricke gels Polyvinyl alcohol 0103 physical sciences Radiation Dosimeter integumentary system 010308 nuclear & particles physics fungi Sulfuric acid chemistry Agarose Nuclear chemistry |
| Popis: | Purpose of this study is to test if possible effects of gelation temperature and pH on the cross-linking process between poly(vinyl alcohol) (PVA) and glutaraldehyde (GTA), have consequences on the dosimetric properties of PVA-GTA Xylenol Orange Fricke gel dosimeters. Therefore, dose-response curves and Fe3+ diffusion rate of PVA-GTA Fricke gel dosimeters prepared using different sulfuric acid concentrations and different gelation temperature were investigated by optical absorbance measurements. The results demonstrated that the sulfuric acid concentration determines both the dose sensitivity of the PVA-GTA Xylenol Orange Fricke gel dosimeters and the interval of linearity of the dose-response curve. Although the effects of gelation temperature and sulfuric acid concentration on the PVA-GTA cross-linking process may occur, no significant consequences on diffusion properties of PVA polymer network were observed. Indeed, Fe3+ diffusion rates in all investigated samples were very similar, and less than half of those achievable in Fricke gel dosimeters prepared with natural gel matrices like gelatin and agarose. |
| Databáze: | OpenAIRE |
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