title: Production of neutrons from interactions of GCR-like particles.
abstract: In order to help assess the risk to astronauts due to the long-term exposure to the natural radiation environment in space, an understanding of how the primary radiation field is changed when passing through shielding and tissue materials must be obtained. One important aspect of the change in the primary radiation field after passing through shielding materials is the production of secondary particles from the breakup of the primary. Neutrons are an important component of the secondary particle field due to their relatively high biological weighting factors, and due to their relative abundance, especially behind thick shielding scenarios. Because of the complexity of the problem, the estimation of the risk from exposure to the secondary neutron field must be handled using calculational techniques. However, those calculations will need an extensive set of neutron cross section and thicktarget neutron yield data in order to make an accurate assessment of the risk. In this paper we briefly survey the existing neutron-production data sets that are applicable to the space radiation transport problem, and we point out how neutron production from protons is different than neutron production from heavy ions. We also make comparisons of one the heavy-ion data sets with Boltzmann-Uehling-Uhlenbeck (BUU) calculations.
authors.affiliation: Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA.
authors.forename: L
authors.initials: L
authors.lastname: Heilbronn
authors.forename: K
authors.initials: K
authors.lastname: Frankel
authors.forename: K
authors.initials: K
authors.lastname: Holabird
authors.forename: C
authors.initials: C
authors.lastname: Zeitlin
authors.forename: M A
authors.initials: MA
authors.lastname: McMahan
authors.forename: W
authors.initials: W
authors.lastname: Rathbun
authors.forename: M
authors.initials: M
authors.lastname: Cronqvist
authors.forename: W
authors.initials: W
authors.lastname: Gong
authors.forename: R
authors.initials: R
authors.lastname: Madey
authors.forename: M
authors.initials: M
authors.lastname: Htun
authors.forename: M
authors.initials: M
authors.lastname: Elaasar
authors.forename: B D
authors.initials: BD
authors.lastname: Anderson
authors.forename: A R
authors.initials: AR
authors.lastname: Baldwin
authors.forename: J
authors.initials: J
authors.lastname: Jiang
authors.forename: D
authors.initials: D
authors.lastname: Keane
authors.forename: A
authors.initials: A
authors.lastname: Scott
authors.forename: Y
authors.initials: Y
authors.lastname: Shao
authors.forename: J W
authors.initials: JW
authors.lastname: Watson
authors.forename: W M
authors.initials: WM
authors.lastname: Zhang
authors.forename: A
authors.initials: A
authors.lastname: Galonsky
authors.forename: R
authors.initials: R
authors.lastname: Ronningen
authors.forename: P
authors.initials: P
authors.lastname: Zecher
authors.forename: J
authors.initials: J
authors.lastname: Kruse
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: R
authors.initials: R
authors.lastname: Cary
mesh_terms: D000337:Aerospace Medicine; D003359:Cosmic Radiation; D019471:Elementary Particle Interactions; D020450:Heavy Ions; D009502:Neutrons; D010315:Particle Accelerators; D011522:Protons; D011835:Radiation Protection
chemical_list: D011522:Protons