Exploring the dose response of radiochromic dosimeters

7th International Conference on 3D Radiation Dosimetry

Skyt, P.S.^1,2 ; Wahlstedt, I.^2 ; Yates, E.S.^1 ; Muren, L.P.^1 ; Petersen, J.B.B.^1 ; Balling, P.^2

Dept. of Medical Physics, Aarhus University, Aarhus University Hospital, Denmark^1

Dept. of Physics and Astronomy, Aarhus University, Denmark^2

关键词: Carbon-centered radicals;    Chlorine radicals;    Dose rate;    Dose rate dependence;    Dose response;    Fluorine radical;    Leucomalachite green;    Molecular size;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012036/pdf
DOI  :  10.1088/1742-6596/444/1/012036

来源: IOP

【 摘 要 】

The aim of this study was to explore the dose response of a newly developed radio-chromic hydrogel dosimeter based on leuco malachite green dye in a gelatine matrix. The original dosimeter composition was first investigated in terms of dose response and dose-rate dependence. In addition, the initiating compounds producing chlorine radicals were substituted with compounds producing fluorine radicals, oxygen-centered radicals, carbon-centered radicals and bromine radicals. Also the surfactant was substituted by other compounds of different molecular size and charge. The original composition gave a dose response of 3.5·10-3Gy-1cm-1at 6 Gy/min with a dose rate dependence giving a 27 % increase when decreasing the dose rate to 1 Gy/min. None of the substituted initiating components contributed to an increase in dose response while only one surfactant increased the dose response slightly.