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  • 1
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    Production of H-3 at large momentum in alpha-(C-12) collisions at 2A GeV (1992)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: Calculations of the longitudinal and transverse momentum distributions for H-3 production at large momentum in alpha-(C-12) collisions near 2A GeV are compared to experiment. Triton exchange and final-state interactions are shown to represent large corrections to the impulse approximation for proton knockout. A method for calculating interference effects for inelastic fragmentation is discussed. Good agreement with experiment using a phenomenological overlap function for (H-3)-p is found successful in describing H-3 production in pion-induced reactions. Comparisons to momentum distributions obtained through (p, 2p) and (e, ep) reactions on He-4 are made.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Physics Letters B (ISSN 0370-2693); 282; 1-2; p. 1-6.
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  • 2
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    Inclusive inelastic scattering of heavy ions in the independent particle model (1992)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: We consider the inclusive inelastic scattering of heavy ions using the Glauber (1959) model and the independent particle approximation. Inclusive inelastic distributions for projectile excitation of the target and total inelastic scattering, where all projectile and target excited states are summed, are discussed using closure. The total inelastic distribution, when integrated, is shown to be equivalent to the absorption cross section, found from applying the optical theorem to the elastic scattering amplitude in the coherent approximation. Calculations are presented for several heavy-ion pairs, using realistic nuclear densities in a large mass number approximation.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Journal of Physics G - Nuclear Physics (ISSN 0305-4616); p. 889-901.
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  • 3
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    Nuclear reaction effects in use of newly recommended quality factor (1991)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: The biological risk for energetic ion exposure cannot be reliably estimated exclusive of the target nuclear reaction products produced within the local tissue. A theoretical basis is derived for evaluating target fragment contributions that are evaluated for the newly proposed quality factor.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Health Physics (ISSN 0017-9078); 61; 415-419
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  • 4
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    Multiple-scattering effects in quasielastic alpha-He-4 scattering (1992)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: A multiple-scattering series for describing the quasielastic peak in nucleus-nucleus collisions is derived using the high-energy optical model. The effects of multiple knockout of target nucleons and internal excitation of the projectile are studied and found to be important for large energy loss and momentum transfers in inclusive alpha-He-4 scattering at 7 GeV/c. An approximate evaluation of higher-order inelastic collision terms is considered for forward-peaked wave functions and is demonstrated to be accurate.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Physical Review C - Nuclear Physics, 3rd Series (ISSN 0556-2813); 46; 4; p. 1451-1456.
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  • 5
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    Nucleon interaction data bases for background estimates (1989)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: Nucleon interaction data bases available in the open literature are examined for potential use in a recently developed nucleon transport code. Particular attention is given to secondary particle penetration and the multiple charged ion products. A brief description of the transport algorithm is given.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
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  • 6
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    Evaluation of highly ionizing components in high-energy nucleon radiation fields (1989)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: The data and models for nuclear fragment recoil distribution produced by high-energy nuclear events in tissue are reviewed. Results for linear energy transfer distributions in soft tissue are derived, and a simple model is developed for use in radiation studies and risk estimates.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Health Physics (ISSN 0017-9078); 57; 717-724
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  • 7
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    High energy nucleon data bases (1988)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: The buildup of 200 MeV secondary protons in an Al shield according to the Bertini (1976) cross sections and Ranft (1980) cross sections is studied. The number of transmitted secondary photons is presented as a function of shield thickness for two different cross section sets. It is found that the Bertini code does not emphasize high LET components.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Health Physics (ISSN 0017-9078); 55; 817-819
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  • 8
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    Inclusive inelastic scattering of heavy ions and nuclear correlations (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Calculations of inclusive inelastic scattering distributions for heavy ion collisions are considered within the high energy optical model. Using ground state sum rules, the inclusive projectile and complete projectile-target inelastic angular distributions are treated in both independent particle and correlated nuclear models. Comparisons between the models introduced are made for alpha particles colliding with He-4, C-12, and O-16 targets and protons colliding with O-16. Results indicate that correlations contribute significantly, at small momentum transfers, to the inelastic sum. Correlation effects are hidden, however, when total scattering distributions are considered because of the dominance of elastic scattering at small momentum transfers.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: NASA-TP-3026 , L-16793 , NAS 1.60:3026
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  • 9
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    Quasi-elastic nuclear scattering at high energies (1992)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The quasi-elastic scattering of two nuclei is considered in the high-energy optical model. Energy loss and momentum transfer spectra for projectile ions are evaluated in terms of an inelastic multiple-scattering series corresponding to multiple knockout of target nucleons. The leading-order correction to the coherent projectile approximation is evaluated. Calculations are compared with experiments.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: NASA-TM-4362 , L-17036 , NAS 1.15:4362
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  • 10
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    Possible complementary cosmic-ray systems: Nuclei and antinuclei (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Arguments are presented for the possible existence of antinuclei of charge Absolute Value of Z greater than 2 and particularly galactic cosmic antinuclei. Theoretical antinucleus-nucleus optical model cross sections are calculated and presented for the first time. A brief review of the nucleon-antinucleon interaction is also presented and its connection with the antinucleus-nucleus interaction is made. The predicted cross sections are smooth and show no structure. Finally, the findings are tied together with the formation of microlesions in living tissue.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: NASA-TP-2741 , L-16275 , NAS 1.60:2741
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