Total reaction cross sections in CEM and MCNP6 at intermediate energies

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:356

Article

Kerby, Leslie M.^1,2  Mashnik, Stepan G.¹ 

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Univ Idaho, Moscow, ID 83844 USA

关键词: Reaction cross sections;    Monte Carlo;    Transport codes;    MCNP6;    Cascade-Exciton Model (CEM);   

DOI  :  10.1016/j.nimb.2015.04.057

来源: Elsevier

【 摘 要 】

Accurate total reaction cross section models are important to achieving reliable predictions from spallation and transport codes. The latest version of the Cascade Exciton Model (CEM) as incorporated in the code CEM03.03, and the Monte Carlo N-Particle transport code (MCNP6), both developed at Los Alamos National Laboratory (LANL), each use such cross sections. Having accurate total reaction cross section models in the intermediate energy region (similar to 50 MeV to similar to 5 GeV) is very important for different applications, including analysis of space environments, use in medical physics, and accelerator design, to name just a few. The current inverse cross sections used in the preequilibrium and evaporation stages of CEM are based on the Dostrovsky et al. model, published in 1959. Better cross section models are available now. Implementing better cross section models in CEM and MCNP6 should yield improved predictions for particle spectra and total production cross sections, among other results. Our current results indicate this is, in fact, the case. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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