Enhanced Electron-Photon Transport in MCNP6

Los Alamos National Laboratory, Los Alamos, NM 87545 USA

^* Corresponding Author, E-mail: hgh@lanl.gov

Abstract

Recently a variety of improved and enhanced methods for low-energy photon/electron transport have been developed for the Monte Carlo particle transport code MCNP6. Aspects of this development include a significant reworking of the MCNP coding to allow for consideration of much more detail in atomic relaxation processes, new algorithms for reading and processing the Evaluated-Nuclear-Data-File photon, electron, and relaxation data capable of supporting such detailed models, and extension of the electron/photon transport energy range below the traditional 1-kilovolt limit in MCNP, with the goal of performing transport of electrons and photons down to energies in the few-electron-volt range. In this paper we provide an overview of these developments.