Behavior of oxidation in the radiochromic gel dosimeter through photoacoustic technique measurements

Natural oxidation is an undesirable process suffered by gel dosimetry systems as it changes the values and spatial distribution of absorbed doses. Natural oxidation of Fricke xylenol gel (FXG) dosimeter was inferred from optical absorbance values measured for the first time using the photoacoustic t...

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Bibliographic Details
Published in:Applied radiation and isotopes 2007-05, Vol.65 (5), p.605-609
Main Authors: Caldeira, A.M.F., Neto, A.M., Bento, A.C., Baesso, M.L., Silva, M.A., de Almeida, A.
Format: Article
Language:English
Subjects:
Acoustics
Gels - chemistry
Optical absorbance
Oxidation-Reduction
Photoacoustics
Radiochromic gel dosimeter
Radiometry - instrumentation
Spontaneous oxidation
Xylenes - chemistry
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Summary:Natural oxidation is an undesirable process suffered by gel dosimetry systems as it changes the values and spatial distribution of absorbed doses. Natural oxidation of Fricke xylenol gel (FXG) dosimeter was inferred from optical absorbance values measured for the first time using the photoacoustic technique. An acoustic detector measures the intensity of the light transmitted by the FXG, which is directly proportional to the ionizing radiation dose absorbed by the samples. In this work, we demonstrated the behavior, the rates, and the dependence of natural oxidation on storage temperature, time, and active components through measurements by photoacoustic technique.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2007.01.012