title: Galactic HZE propagation through the Earth's atmosphere.
abstract: A comprehensive physical model for galactic heavy ion propagation is presented.  The nuclear fragmentation model is a simplified physical model but contains the major processes of importance to galactic ions.  Comparison is made to measurements of atmospheric ion fluence and the limitations of these comparisons are discussed.
authors.affiliation: NASA Langley Research Center, Hampton, Virginia 23665, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Wilson
authors.forename: L W
authors.initials: LW
authors.lastname: Townsend
authors.forename: F F
authors.initials: FF
authors.lastname: Badavi
mesh_terms: D001608:Beryllium; D001895:Boron; D002244:Carbon; D003359:Cosmic Radiation; D004601:Elementary Particles; D018499:Linear Energy Transfer; D008094:Lithium; D008433:Mathematics; D008962:Models, Theoretical; D009686:Nuclear Physics; D011835:Radiation Protection
chemical_list: D002244:Carbon; D008094:Lithium; D001895:Boron; D001608:Beryllium