Monte Carlo Calculations of High-Energy Nucleon--Meson Cascades and Comparison With Experiment.

Calculations of neutron flux spectra induced in the Earth's atmosphere by galactic cosmic rays

“…The Monte Carlo code HETC [Chandler and Armstrong, 1972] was used to compute the transport of protons, charged pions, primary alpha particles, and neutrons > 12 MeV, and the discrete ordinates code ANISN [Engle, 19671 , was used for the low-energy (s 12 MeV) neutron transport. Since the standard version of HETC cannot transport alpI • ia.…”

“…In the present work, the Monte Carlo code HETC [Chandler and Armstrong, 1972]` was used to compute the production and transport of protons, charged pions, and neutrons (, 12 MeV) due to protorts and alpha particles incident on the top of the atmosphere. The neutron production s 12 MeV from the HETC -.. ^ +n5.^rranY+c '-•mr y r pe'mz"rr -.0.r--*' l I.s^:._`" ' calculation was used as input to the discrete ordinates code.ANISN [Engle, 1967] to obtain the low-energy (s 12 MeV) portion of the neutron spectra, a…”

Neutron Capture Isotopes in the Martian Regolith and Implications for Martian Atmospheric Noble Gases

“…This Monte Carlo code treats particle production and transport in three dimensions and assumes a time-dependent, continuous energy distribution (Masarik andReedy 1996, Drake et al 1994). The high-energy part of neutron interactions and all interactions of heavy ions, protons, π mesons, muons, and other elementary particles are simulated by the Los Alamos version of the High-Energy Transport Code (HETC; Armstrong et al 1972). Neutrons with energies below a cutoff value are bunched together with their kinematical parameters into a neutron file, which serves as the input file for the Monte Carlo N-particle code (Briesmeister 1993).…”

Shielding calculations for a 200-MeV proton accelerator and comparisons with experimental data

“…The source-spectrum calculations were carried out with the Monte Carlo tran:sport code HETC. 6 .This code has been described in detail elsewhere 7 and therefore will not be discussed here. It is perhaps worth mentioning, however, that the source of the differential particleproduction cross-section data used in HETC at the higher energies (> 15 MeV) is the same as the source of all of the high-energy nonelastic crosssection data used in this paper-namely, the intranuclear-cascade-evaporation model of nuclear reactions as implemented by Bertini.…”