Il Nuovo Cimento (1955-1965)

, Volume 8, Supplement 2, pp 549–555 | Cite as

On the origin of the charge spectrum of the primary cosmic radiation

  • S. F. Singer
Composition of the Primary Radiation


We find that we can account quite well for the observed primary charge distribution by assuming (quite artificially) a model in which the original radiation consists only of iron (*). After about three mean free paths (6 g/cm2) a charge distribution is obtained which resembles very much the observed values. The good agreement is possible only if one uses results on «p » and «α» fragments obtained from meteorite measurements, and if one uses the smaller fragmentation probabilities obtained by the Bristol group for Li, Be and B.


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Copyright information

© Società Italiana di Fisica 1958

Authors and Affiliations

  • S. F. Singer
    • 1
  1. 1.University of Maryland — College ParkMaryland

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