title: Space proton transport in one dimension.
abstract: An approximate evaluation procedure is derived for a second-order theory of coupled nucleon transport in one dimension.  An analytical solution with a simplified interaction model is used to determine quadrature parameters to minimize truncation error.  Effects of the improved method on transport solutions with the BRYNTRN data base are evaluated.  Comparisons with Monte Carlo benchmarks are given.  Using different shield materials, the computational procedure is used to study the physics of space protons.  A transition effect occurs in tissue near the shield interface and is most important in shields of high atomic number.
authors.affiliation: Old Dominion University, Department of Physics, Norfolk, Virginia 23529-0116.
authors.forename: S L
authors.initials: SL
authors.lastname: Lamkin
authors.forename: G S
authors.initials: GS
authors.lastname: Khandelwal
authors.forename: J L
authors.initials: JL
authors.lastname: Shinn
authors.forename: J W
authors.initials: JW
authors.lastname: Wilson
mesh_terms: D003198:Computer Simulation; D003359:Cosmic Radiation; D004601:Elementary Particles; D004735:Energy Transfer; D008433:Mathematics; D015233:Models, Statistical; D009010:Monte Carlo Method; D011522:Protons; D011829:Radiation Dosage; D011835:Radiation Protection / Q000706:statistics & numerical data*; D012542:Scattering, Radiation; D016082:Solar System
chemical_list: D011522:Protons