Electron Beam Quality Determination Through Fricke Xylenol Gel Dosimeter

Journal Article · Tue Mar 10 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3119990· OSTI ID:21289502

Petchevist, P C. D. ^[1]; Moreira, M V ^[1]; Almeida, A de ^[2]

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1. Instituto de Radioterapia e Megavoltagem de Ribeirao Preto-IRMEV, SP (Brazil)
2. Departamento de Fisica e Matematica FFCLRP-USP, Ribeirao Preto, SP (Brazil)

According to the IAEA TRS-398 protocol, a parallel plate ionization chamber is recommended to be used in electron dosimetry. The important dosimetric parameters such as R{sub 100} and R{sub 50}, inferred from the percentage depth dose (PDD) curve, allow to obtain the electron beam average energy at the water phantom surface (material equivalent to the soft tissue). In this work, a chemical dosimeter based on the Fe(II) to Fe(III) oxidation was used to obtain the average energies from electrons beams (from nominal energies of 5, 8 and 10 MeV) and related parameters of R{sub 100}, R{sub 50} and z{sub ref}. These energies obtained through the Fricke Xylenol Gel (FXG) were compared to those with a parallel plate ionization chamber, following the cited protocol, which showed no significant differences. From these measurements one can conclude the FXG applicability for R{sub 100}, R{sub 50} and electron beam average energy determination.

• OSTI ID: 21289502
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1099; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
CHEMICAL DOSEMETERS
COMPARATIVE EVALUATIONS
DEPTH DOSE DISTRIBUTIONS
ELECTRON BEAMS
ELECTRON DOSIMETRY
GELS
IONIZATION CHAMBERS
IRON IONS
MEV RANGE
OXIDATION
PHANTOMS
XYLENOLS