Neutron Production Measurements Relevant to Shielding forSpace-Related Activities

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Neutron production cross sections have been measured from290 MeV/nucleon C and 600 MeV/nucleon Ne interacting in a slab ofsimulated Martian regolith/polyethylene composite, and from 400MeV/nucleon Ne interacting in a section of wall materials from theInternational Space Station. Neutron spectra were measured at 7 anglesbetween 5 degrees and 80 degrees, and for neutron energies 5 MeV andgreater. Spectra at forward angles are dominated by the breakup of theprojectile, whereas spectra at back angles show the typical exponentialfalloff with energy that is indicative of decay from the overlap regionand the target remnant. The measured total neutron production crosssections indicate that the regolith/polyethylene ... continued below

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Heilbronn, Lawrence; Iwata, Yoshiyuki; Murakami, Takeshi; Iwase,Hiroshi; Nakamura, Takashi; Sato, Hisaki et al. April 9, 2002.

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Neutron production cross sections have been measured from290 MeV/nucleon C and 600 MeV/nucleon Ne interacting in a slab ofsimulated Martian regolith/polyethylene composite, and from 400MeV/nucleon Ne interacting in a section of wall materials from theInternational Space Station. Neutron spectra were measured at 7 anglesbetween 5 degrees and 80 degrees, and for neutron energies 5 MeV andgreater. Spectra at forward angles are dominated by the breakup of theprojectile, whereas spectra at back angles show the typical exponentialfalloff with energy that is indicative of decay from the overlap regionand the target remnant. The measured total neutron production crosssections indicate that the regolith/polyethylene composite may be a moreeffective shielding material than the ISS wall materials, in terms of thenumber of neutrons produced.

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  • Shielding Aspects of Accelerators, Targets andIrradiation Facilities - SATIF 6, SLAC, Palo Alto, CA, April 10-12,2002

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  • Report No.: LBNL--61910
  • Grant Number: DE-AC02-05CH11231
  • Grant Number: NASA:H-29456D
  • Grant Number: NASA:L14230C,NSF:95-28844
  • Office of Scientific & Technical Information Report Number: 902801
  • Archival Resource Key: ark:/67531/metadc882508

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  • April 9, 2002

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 29, 2016, 3:21 p.m.

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Heilbronn, Lawrence; Iwata, Yoshiyuki; Murakami, Takeshi; Iwase,Hiroshi; Nakamura, Takashi; Sato, Hisaki et al. Neutron Production Measurements Relevant to Shielding forSpace-Related Activities, article, April 9, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc882508/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.