Physics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001stin...0166734h&link_type=abstract
Technical Report, Old Dominion Univ. Norfolk, VA United States
Physics
Green'S Functions, Light Ions, Radiation Protection, Extraterrestrial Radiation, Heavy Ions, Boltzmann Transport Equation, Flux (Rate), Continuum Modeling, Ionization, Ionic Collisions
Scientific paper
The purpose of this research was to study the propagation of galactic ions through various materials. Galactic light ions result from the break up of heavy ion particles and their propagation through materials is modeled using the one-dimensional Boltzmann equation. When ions enter materials there can occur (i) the interaction of ions with orbital electrons which causes ionization within the material and (ii) ions collide with atoms causing production of secondary particles which penetrate deeper within the material. These processes are modeled by a continuum model. The basic idea is to place a control volume within the material and examine the change in ion flux across this control volume. In this way on can derive the basic equations for the transport of light and heavy ions in matter. Green's function perturbation methods can then be employed to solve the resulting equations using energy dependent nuclear cross sections.
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