title: CPP calculation of multiple scattering distributions for charged particles penetrating compounds or mixtures.
abstract: Charged particle multiple scattering distributions may be constructed from individual atomic scattering events on the basis of compound Poisson process (CPP) theory. We present a CPP method for computing multiple scattering transition probability densities from charged particles penetrating compounds and mixtures. Water as a scattering medium provides here an example of the calculation method which is applicable to compounds or mixtures. Electrons are chosen as examples of charged particle beams. The Rutherford single scattering cross section and a partial wave analysis single scattering cross section are chosen as example cross sections. Transition probability densities predicted on the basis of CPP theory can be calculated with great accuracy for the improvement of radiation dose calculations. The advantages of the CPP method are (a) an effective atomic number need not be defined for the scattering medium, (b) it can be applied in both spherical and planar coordinate systems, and (c) it does not require any specific form for the single scattering cross section.
authors.affiliation: Department of Radiation Oncology, Indiana University Medical Center, Indianapolis 46202, USA.
authors.forename: L
authors.initials: L
authors.lastname: Papiez
authors.forename: G
authors.initials: G
authors.lastname: Sandison
authors.forename: X
authors.initials: X
authors.lastname: Ning
authors.forename: X
authors.initials: X
authors.lastname: Lu
mesh_terms: D000465:Algorithms; D004583:Electrons / Q000627:therapeutic use; D016012:Poisson Distribution; D011874:Radiometry / Q000379:methods*; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D012542:Scattering, Radiation