title: Heavy fragment production cross sections from 1.05 GeV/nucleon 56Fe in C, Al, Cu, Pb, and CH2 targets.
abstract: We have obtained charge-changing cross sections and partial cross sections for fragmentation of 1.05 GeV/nucleon Fe projectiles incident on H, C, Al, Cu, and Pb nuclei. The energy region covered by this experiment is critical for an understanding of galactic cosmic ray propagation and space radiation biophysics. Surviving primary beam particles and fragments with charges from 12 to 25 produced within a forward cone of half-angle 61 mrad were detected using a silicon detector telescope to identify their charge and the cross sections were calculated after correction of the measured yields for finite target thickness effects. The cross sections are compared to model calculations and to previous measurements. Cross sections for the production of fragments with even-numbered nuclear charges are seen to be enhanced in almost all cases.
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: C
authors.initials: C
authors.lastname: Zeitlin
authors.forename: L
authors.initials: L
authors.lastname: Heilbronn
authors.forename: J
authors.initials: J
authors.lastname: Miller
authors.forename: S E
authors.initials: SE
authors.lastname: Rademacher
authors.forename: T
authors.initials: T
authors.lastname: Borak
authors.forename: T R
authors.initials: TR
authors.lastname: Carter
authors.forename: K A
authors.initials: KA
authors.lastname: Frankel
authors.forename: W
authors.initials: W
authors.lastname: Schimmerling
authors.forename: C E
authors.initials: CE
authors.lastname: Stronach
mesh_terms: D000535:Aluminum; D002244:Carbon; D003300:Copper; D003359:Cosmic Radiation; D004601:Elementary Particles; D006859:Hydrogen; D007477:Ions; D007501:Iron; D007854:Lead; D008962:Models, Theoretical; D009686:Nuclear Physics; D011095:Polyethylenes; D011834:Radiation Monitoring; D017356:Synchrotrons
chemical_list: D007477:Ions; D011095:Polyethylenes; D007854:Lead; D002244:Carbon; D003300:Copper; D006859:Hydrogen; D000535:Aluminum; D007501:Iron