Sorbitol to reduce Fe diffusion in a Fricke gel dosimeter and enhance its resistance to elongation

This work presents a 2D Fricke dosimeter with xylenol orange (XO), gelatine matrix and addition of sorbitol. The dosimeter was irradiated with various monitor units ranging from 500 to 10000 MU (3.6-72 Gy). The addition of sorbitol significantly reduced the diffusion coefficient of Fe 3+ ions and improved the mechanical properties of the gel, while the chemical stability of the dosimeter decreased.