Effect of inorganic salts and matrix crosslinking on the dose response of polymer gel dosimeters based on acrylamide

CHACÓN, DAVID; STRUMIA, MIRIAM; VALENTE, MAURO; MATTEA, FACUNDO

RADIATION MEASUREMENTS

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2018 vol. 117 p. 7 - 7

1350-4487

he use of additives in polymer gel dosimeters to enhance their sensitivity or to improve their performance is of great importance for their application in radiomedicine. Inorganic salts have been used as additives with this purpose; however, their presence in the dosimeters induce severe modifications in their mechanical properties and consequently in their capabilities to maintain a stable dose distribution with time. Most studies in this area conclude in the need to use chemical modifications of the species responsible for the mechanical properties of the dosimeters, which in most cases is a gelatin matrix. In this study, a covalent crosslinking of the gelatin matrix of PAGAT dosimeters doped with different inorganic salts, namely MgCl2, CaCl2 and MnCl2 has been carried out. The mechanical properties, X-ray sensitivity and dose distribution stability in these materials were compared to those of PAGAT. The results indicated a compromise between the crosslinking of the gelatin structu