2012
DOI: 10.1109/tns.2012.2203609
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Photon Elastic Scattering Simulation: Validation and Improvements to Geant4

Abstract: Abstract-Several models for the simulation of photon elastic scattering are quantitatively evaluated with respect to a large collection of experimental data retrieved from the literature. They include models based on the form factor approximation, on S-matrix calculations and on analytical parameterizations; they exploit publicly available data libraries and tabulations of theoretical calculations. Some of these models are currently implemented in general purpose Monte Carlo systems; some have been implemented… Show more

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Cited by 37 publications
(47 citation statements)
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References 165 publications
(269 reference statements)
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“…Currently, none of the commonly used Monte Carlo codes for radiation transport, e.g., GEANT4 [7,8], PENELOPE [9,10], or MCPNX [11,12] model the interference of coherent scattered photons in diffraction that would allow one to image the electron charge distribution or form factor of the sample. Coherent scatter diffraction is not modeled in most Monte Carlo simulations for two reasons: First, the interatomic spacing or configuration of atoms in the materials is not a single default value; and second, in many Monte Carlo codes such as GEANT4, photons are tracked one at a time in the simulation, so interference between photons or electromagnetic waves cannot be modeled readily.…”
Section: Coherent Scattering In Monte Carlo Simulationsmentioning
confidence: 99%
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“…Currently, none of the commonly used Monte Carlo codes for radiation transport, e.g., GEANT4 [7,8], PENELOPE [9,10], or MCPNX [11,12] model the interference of coherent scattered photons in diffraction that would allow one to image the electron charge distribution or form factor of the sample. Coherent scatter diffraction is not modeled in most Monte Carlo simulations for two reasons: First, the interatomic spacing or configuration of atoms in the materials is not a single default value; and second, in many Monte Carlo codes such as GEANT4, photons are tracked one at a time in the simulation, so interference between photons or electromagnetic waves cannot be modeled readily.…”
Section: Coherent Scattering In Monte Carlo Simulationsmentioning
confidence: 99%
“…Coherent scatter diffraction is not modeled in most Monte Carlo simulations for two reasons: First, the interatomic spacing or configuration of atoms in the materials is not a single default value; and second, in many Monte Carlo codes such as GEANT4, photons are tracked one at a time in the simulation, so interference between photons or electromagnetic waves cannot be modeled readily. GEANT4 models coherent and incoherent scattering using re-engineered implementations of the PENELOPE Monte Carlo code [9,10]. The models for both types of scattering use the assumption of the independent atomic approximation (IAA) for scattering [13], which neglects interference between electromagnetic waves scattering off of electrons or atoms near each other in a medium.…”
Section: Coherent Scattering In Monte Carlo Simulationsmentioning
confidence: 99%
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“…A policy-based class design [20] has been adopted: it ensures flexibility at endowing the Compton scattering process with multiple behaviours based on a variety of alternative modeling approaches, while the intrinsic simplicity, restricted responsibilities, and minimized dependencies of policy classes facilitate the testing of the software both in the processes of verification and of validation. The same software design approach has been successfully adopted in the simulation of photon elastic scattering [21]. The physics functionality of policy classes can be tested by means of simple unit tests, whereas the design of the Compton models in Geant4 9.6 hinders testing the physics functionality of the models outside a full simulation environment.…”
Section: Refactored Softwarementioning
confidence: 99%
“…An overview can be found in [12], validation results for photon elastic scattering have been reported in [13], preliminary results for photo-ionization and electron-positron pair production were presented at this conference (see [14], [15]). …”
Section: Introductionmentioning
confidence: 99%