Characteristics of modified radiochomic gel Turnbull-Blue

9th International Conference on 3D Radiation Dosimetry

Silveira, M.A.^1 ; Pavoni, J.F.^1 ; Baffa, O.^1

Departamento de Física, FFCLRP, Universidade de São Paulo, Av Bandeirantes 3900, Monte Alegre, Ribeirão Preto, SP

14040-901, Brazil^1

关键词: Agarose gel;    Dose rate dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012018/pdf
DOI  :  10.1088/1742-6596/847/1/012018

来源: IOP

【 摘 要 】

This work presents a dosimetric characterization of the modified radiochromic gel Turnbull-Blue (TB). Formaldehyde a cross-link agent was added to the composition. This modification raised the melting point of agarose gel to 55°C, 22°C above the agarose gel matrix. For this new gel formulation the energy, dose-rate dependence and Diffusion coefficient were verified. The modified TB gel showed higher sensitivity in the 6 MV than 15 MV beam. Dose rate dependence was evaluated from 100 to 500 cGy/min using a 15MV linear accelerator. The results show variations in sensitivity for dose rate dependence. The addition of formaldehyde does not affects the diffusion coefficient for the modified Turnbull-Blue.