Semiempirical Cross Sections, and Applications to Nuclear Interactions of Cosmic Rays

  • R. Silberberg
  • C. H. Tsao
  • M. M. Shapiro
Part of the Astrophysics and Space Science Library book series (ASSL, volume 59)


We have formulated semiempirical calculations of partial cross sections (papers ST in the references) for calculating the many yields, as yet unmeasured, of high-energy reactions. Here we present parameters that are updated on the basis of recent experimental data. These calculations have been employed in the analysis of cosmic-ray data when measured values are unavailable. (About half of the cosmic rays heavier than helium have undergone spallation since their acceleration.) The calculations have yielded: (a) the elemental composition of cosmic rays at the sources, (b) the expected isotopic composition of cosmic rays at the top of the atmosphere, (c) the mean path length of material traversed by cosmic rays, and the distribution function of path lengths, and (d) predicted abundances of long-lived radioactive secondary cosmic-ray nuclides for the determination of confinement time in the galaxy. The current status of these calculations is presented, using the experimental data on cross sections and on the composition of cosmic rays reported up to September, 1975.


Isotopic Composition Path Length Partial Cross Section Semiempirical Calculation Confinement Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1976

Authors and Affiliations

  • R. Silberberg
    • 1
  • C. H. Tsao
    • 1
  • M. M. Shapiro
    • 1
  1. 1.Laboratory for Cosmic Ray PhysicsNaval Research LaboratoryUSA

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