September 27, 2004 to October 1, 2004
Interlaken, Switzerland
Europe/Zurich timezone

Precision electromagnetic physics in Geant4: the atomic relaxation models

Sep 27, 2004, 4:50 PM
Kongress-Saal (Interlaken, Switzerland)


Interlaken, Switzerland

oral presentation Track 2 - Event processing Event Processing




Various experimental configurations - such as, for instance, some gaseous detectors, require a high precision simulation of electromagnetic physics processes, accounting not only for the primary interactions of particles with matter, but also capable of describing the secondary effects deriving from the de-excitation of atoms, where primary collisions may have created vacancies. The Geant4 Simulation Toolkit encompasses a set of models to handle the atomic relaxation induced by the photoelectric effect, Compton scattering and ionization, with the production of X-ray fluorescence and of Auger electrons. We describe the physics models implemented in Geant4 to handle the atomic relaxation, the object-oriented design of the software and the validation of the models with respect to test beam data. In particular, we present a novel development of an original model for particle induced X-ray emission, to be released for the first time in the summer of 2004. We illustrate applications of Geant4 atomic relaxation models for physics reach studies in a real-life experimental context

Primary authors

A. Mantero (INFN Genova) M.G. Pia (INFN GENOVA) S. Guatelli (INFN Genova, Italy) S. Saliceti (INFN Genova)

Presentation materials