title: A procedure for benchmarking laboratory exposures with 1 A GeV iron ions.
abstract: A new version of the HZETRN code capable of simulating HZE ions with either laboratory or space boundary conditions is under development. The computational model consists of combinations of physical perturbation expansions based on the scales of atomic interaction, multiple scattering, and nuclear reactive processes with use of asymptotic/Neumann expansions with non-perturbative corrections. The code contains energy loss with straggling, nuclear attenuation, nuclear fragmentation with energy dispersion and downshifts, and off-axis dispersion with multiple scattering under preparation. The present benchmark is for a broad directed beam for 1 A GeV iron ion beams with 2 A MeV width and four targets of polyethylene, polymethyl metachrylate, aluminum, and lead of varying thickness from 5 to 30 g/cm2. The benchmark quantities will be dose, track averaged LET, dose averaged LET, fraction of iron ion remaining, and fragment energy spectra after 23 g/cm2 of polymethyl metachrylate.
authors.affiliation: NASA Langley Research Center, Hampton, VA 23681-2199, USA. John.W.Wilson@Larc.Nasa.Gov
authors.forename: John W
authors.initials: JW
authors.lastname: Wilson
authors.forename: John
authors.initials: J
authors.lastname: Tweed
authors.forename: Steve A
authors.initials: SA
authors.lastname: Walker
authors.forename: Francis A
authors.initials: FA
authors.lastname: Cucinotta
authors.forename: Ram K
authors.initials: RK
authors.lastname: Tripathi
authors.forename: Steve
authors.initials: S
authors.lastname: Blattnig
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Mertens
mesh_terms: D000535:Aluminum; D003198:Computer Simulation; D020450:Heavy Ions; D007501:Iron; D007854:Lead; D018499:Linear Energy Transfer; D008962:Models, Theoretical; D009686:Nuclear Physics; D020959:Polyethylene; D019904:Polymethyl Methacrylate; D011522:Protons; D011829:Radiation Dosage; D012015:Reference Standards
chemical_list: D011522:Protons; D007854:Lead; D020959:Polyethylene; D019904:Polymethyl Methacrylate; D000535:Aluminum; D007501:Iron