A computationally effcient moment-preserving Monte Carlo proton transport method in Geant4
1 Los Alamos National Laboratory, Los Alamos, NM 87545
2 University of New Mexico, Dept. of Nuclear Engineering, Albuquerque, NM 87131
Published online: 25 September 2017
The moment-preserving method, demonstrated as a viable alternative to condensed history for electrons, is extended to protons. Given the generality and the flexibility of the method, a discrete Coulomb scattering and discrete impactionization differential cross-section library for protons was readily developed and existing Geant4 electron discrete process and model classes were extended to make use of the new proton library. It is shown that levels of effciency and accuracy similar to those demonstrated for electrons are obtainable for protons in straight-ahead, energy-loss problems. However, in problems with deflection, agreement is strongly dependent on the proton energy. That is, good agreement was observed in the few MeV range, while unsatisfactory agreement was observed in problems with proton energies above 100-MeV.
Key words: MCNP6 / Monte Carlo / electron-photon transport / multiple-scattering / validation
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.