title: Evaluation of characteristic-to-total spectrum ratio: Comparison between experimental and a semi-empirical model.
abstract: Primary X-ray spectra were measured in the range of 80-150kV in order to validate a computer program based on a semiempirical model. The ratio between the characteristic and total air Kerma was considered to compare computed results and experimental data. Results show that the experimental spectra have higher first HVL and mean energy than the calculated ones. The ratios between the characteristic and total air Kerma for calculated spectra are in good agreement with experimental results for all filtrations used.
authors.affiliation: Laboratory of Radiation Dosimetry and Medical Physics, Physics Institute of São Paulo University, 66318 São Paulo, SP, Brazil.
authors.forename: A H
authors.initials: AH
authors.lastname: Lopez Gonzales
authors.affiliation: Physics Institute "Gleb Wataghin", Universidade Estadual de Campinas, 13083-859 Campinas, SP, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Tomal
authors.affiliation: Laboratory of Radiation Dosimetry and Medical Physics, Physics Institute of São Paulo University, 66318 São Paulo, SP, Brazil. Electronic address: pcosta@if.usp.br.
authors.forename: P R
authors.initials: PR
authors.lastname: Costa
keywords: CdTe detector.; Characteristic-to-total spectrum ratio; X-ray spectrum