title: Evaluation of the depth-ratio and backscattering-factor methods in quality control measurements of electron beam energies.
abstract: Sensitivities of two different methods for evaluating electron beam energy have been investigated. One of them uses the ratio of ionization at two depths corresponding to two different points on the depth curve of ionization. The other one uses the magnitude of backscattering by lead as a measure of the electron beam energy. The depth-ratio method was found to be sensitive and practical for a routine quality control program. The sensitivity of the backscattering effect was found to be insufficient for electron energies higher than 12 MeV.
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, Caixa Postal 11049, CEP 05422-970 São Paulo, SP, Brazil.
authors.forename: Cleber N
authors.initials: CN
authors.lastname: De Souza
authors.forename: Cláudio H
authors.initials: CH
authors.lastname: Sibata
authors.forename: Linda V E
authors.initials: LV
authors.lastname: Caldas
mesh_terms: D000465:Algorithms; D004583:Electrons; D011785:Quality Assurance, Health Care / Q000379:methods*; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012542:Scattering, Radiation