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    Titanium spallation cross sections between 30 and 584 MeV and Ar-39 activities on the moon (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The production cross sections of Ar39 for Ti spallation at 45-, 319-, 433-, and 584-MeV proton energies were measured to be 0.37 + or - 0.09, 12.4 + or - 3.7, 9.1 + or - 2.7, and 17.8 + or - 6.2 mb, respectively. Normalized Ar39 production rates and activities are also derived for protons above 40 MeV and for three differential proton spectra of the type approximately E(- alpha). It is concluded that, even for samples of high-Ti content, Ti spallation by solar protons below 200-MeV energy does not contribute significantly to their Ar39 radioactivity.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-134251 , SAO-404-068
    Format: application/pdf
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