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From

Evaluation of the Average Weighting Factor in Thin Layer Irradiation by Bremsstrahlung

A.V. Belousov, U.A. Bliznyuk, A.P. Chernyaev

Biomedicine and Biotechnology. 2014, 2(4), 80-84 doi:10.12691/bb-2-4-3
  • Figure 1. Geometrical model of medical accelerator simulated with GEANT4
  • Figure 2. Bremsstrahlung spectra with the maximum energy of 20 and 30 MeV calculated by GEANT4
  • Figure 3. Dependence of the contribution to the absorbed dose from photons, electrons, and positrons on the energy of the primary photons for layers of different thicknesses
  • Figure 4. Dependence of the contribution to the absorbed dose from alpha particles and recoil nuclei on the energy of the primary photons for the layers of different thicknesses
  • Figure 5. Dependence of the contribution to the absorbed dose from protons on the energy of the primary photons for the layers of different thicknesses
  • Figure 6. Dependence of the averaged radiation weighting factor for all types of radiation on the energy of the primary photons for the layers of different thicknesses
  • Figure 7. Dependence of the averaged radiation weighting factor for all types of radiation on the the layer thickness for different energies of primary photons
  • Figure 8. Dependence of wR of bremsstrahlung radiation on the spectrum’s maximum energy
  • Figure 9. Dependence of wR of bremsstrahlung radiation on the layer thickness for spectra of different maximum energy