title: Behavior of oxidation in the radiochromic gel dosimeter through photoacoustic technique measurements.
abstract: 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.
authors.affiliation: Departamento de Física e Matemática, Universidade de São Paulo, Av Bandeirantes 3900, 1040-91 Ribeirão Preto, SP, Brazil. ademar@pg.ffclrp.usp.br
authors.forename: A M F
authors.initials: AM
authors.lastname: Caldeira
authors.forename: A M
authors.initials: AM
authors.lastname: Neto
authors.forename: A C
authors.initials: AC
authors.lastname: Bento
authors.forename: M L
authors.initials: ML
authors.lastname: Baesso
authors.forename: M A
authors.initials: MA
authors.lastname: Silva
authors.forename: A
authors.initials: A
authors.lastname: de Almeida
mesh_terms: D000162:Acoustics; D005782:Gels / Q000737:chemistry; D010084:Oxidation-Reduction; D011874:Radiometry / Q000295:instrumentation*; D014992:Xylenes / Q000737:chemistry*
chemical_list: D005782:Gels; D014992:Xylenes; C016834:3,5-xylenol