Mcnp free software

Thermal neutrons are described by both the free gas and S alpha,beta models. For photons, the code accounts for incoherent and coherent scattering, the possibility of fluorescent emission after photoelectric absorption, absorbtion in pair production with local emission of annihilation radiation, and bremsstrahlung.

A continuous-slowing-down model is used for electron transport that includes positrons, k x-rays, and bremsstrahlung but does not include external or self-induced fields. Important standard features that make MCNP very versatile and easy to use include a powerful general source, criticality source, and surface source; both geometry and output tally plotters; a rich collection of variance reduction techniques; a flexible tally structure; and an extensive collection of cross-section data.

As discussed in the references below, previous data released with MCNP6. Up to 14 GB may be required during file expansion. MCNP5 1. The code has improved support for newer Fortran 90 compilers. The gcc C compiler is used for all versions. The compilers supported are listed below. Included executables and reference templates for output and tally files used in the MCNP5 regression test suite were generated for Linux and Windows with the following compilers:. Linux: bit AMD Opteron 2. Dynamic storage allocation is available on all supported systems.

For computers having multi-core processors e. Note that some compilers are not yet suitable for compiling a threaded version of MCNP5. For plotting geometry, cross-sections, or results, X11 must be installed on your PC. An X-windows server is required to display the X11 graphics.

Included documentation in electronic format to be extracted to your hard drive:. MCNP5 - 1. Verification of MCNP5 - 1. October , revised February , September ; June MCNPX is a production computer code that models the interaction of radiation with matter.

For details, see LA-UR It was first released to the public in as version 2. The release of version 2. Many new tally source and variance-reduction options have been developed. MCNPX is released with libraries for neutrons, photons, electrons, protons and photonuclear interactions.

In addition, variance reduction schemes such as secondary particle biasing , and new tallies have been created specific to the intermediate and high energy physics ranges. Energy deposition received a substantial reworking based on the demands of charged-particle high-energy physics.

Runtimes vary depending on computer speed and problem parameters. Test cases run in about 5 minutes. MCNPX runs under Unix, Linux, and Windows operating systems and has been implemented on various bit and bit workstations and personal computers. Dynamic allocation makes memory demands variable on all platforms. C and Fortran 90 compilers are required to compile. The GNU make.

Each of these files contains precompiled executables and corresponding binary data libraries for bertin and phtlib. Pelowitz, ed. Hendricks, et al.

Schwarz , R. Schwarz, and L. Waters, ed. Briesmeister, ed. Prael and H. Chadwick, et al. Mashnik, A. Sierk, O. Bersillon, and T. A Stepan, et al. Mashnik, et al. S1, CEM G1 Versions of CEM