A systematic study of the absorption spectra of Fricke xylenol orange gel dosimeters has been performed, in the wavelength range from 300 nm to 700 nm. The spectrum of xylenol orange (without ferrous sulphate solution) has been achieved, in order to subtract its contribution from the absorption spectra of the irradiated Fricke xylenol orange gel dosimeters. The absorbance due to ferric ions chelated by xylenol orange has been studied for various irradiation doses. Two absorbance peaks are visible, mainly at low doses: the first peak increases with the dose more slowly than the second one. This effect can explain the apparent threshold dose that was frequently evidenced.

Study of the absorption spectra of Fricke xylenol orange gel dosimeters

LIOSI, GIULIA MARIA;GIACOBBO, FRANCESCA CELSA;MARIANI, MARIO;CASTIGLIONI, CHIARA;
2015

Abstract

A systematic study of the absorption spectra of Fricke xylenol orange gel dosimeters has been performed, in the wavelength range from 300 nm to 700 nm. The spectrum of xylenol orange (without ferrous sulphate solution) has been achieved, in order to subtract its contribution from the absorption spectra of the irradiated Fricke xylenol orange gel dosimeters. The absorbance due to ferric ions chelated by xylenol orange has been studied for various irradiation doses. Two absorbance peaks are visible, mainly at low doses: the first peak increases with the dose more slowly than the second one. This effect can explain the apparent threshold dose that was frequently evidenced.
2015 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, ANIMMA 2015
9781479999187
Fricke gel; Gelatin; Optical absorbance measurement; Radiation dosimetry; Radiology, Nuclear Medicine and Imaging; Radiation; Instrumentation; Nuclear and High Energy Physics
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1023938
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