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Hzetrn: description of a free-space ion and nucleon transport and shielding computer program
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wilson, John W. Tsao, C. H. Shinn, Judy L. Badhwar, Gautam D. Tripathi, Ram K. Townsend, Lawrence W. Silberberg, R. Cucinotta, Francis A. Badavi, Francis F. |
| Copyright Year | 1995 |
| Description | The high-charge-and energy (HZE) transport computer program HZETRN is developed to address the problems of free-space radiation transport and shielding. The HZETRN program is intended specifically for the design engineer who is interested in obtaining fast and accurate dosimetric information for the design and construction of space modules and devices. The program is based on a one-dimensional space-marching formulation of the Boltzmann transport equation with a straight-ahead approximation. The effect of the long-range Coulomb force and electron interaction is treated as a continuous slowing-down process. Atomic (electronic) stopping power coefficients with energies above a few A MeV are calculated by using Bethe's theory including Bragg's rule, Ziegler's shell corrections, and effective charge. Nuclear absorption cross sections are obtained from fits to quantum calculations and total cross sections are obtained with a Ramsauer formalism. Nuclear fragmentation cross sections are calculated with a semiempirical abrasion-ablation fragmentation model. The relation of the final computer code to the Boltzmann equation is discussed in the context of simplifying assumptions. A detailed description of the flow of the computer code, input requirements, sample output, and compatibility requirements for non-VAX platforms are provided. |
| File Size | 5158421 |
| Page Count | 152 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950022109 |
| Archival Resource Key | ark:/13960/t3cz84z1d |
| Language | English |
| Publisher Date | 1995-05-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Dosimeters Electron Scattering Fragmentation Ramsauer Effect Radiation Transport Stopping Power Algorithms Boltzmann Transport Equation Nucleons Radiation Shielding Applications Programs Computers Absorption Cross Sections Energy Transfer Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
