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Il Nuovo Cimento C

, Volume 9, Issue 6, pp 1125–1129 | Cite as

The proton-air cross-section at 1016 eV

  • B. R. Dawson
  • R. W. Clay
  • P. G. Edwards
  • J. R. Prescott
Article

Summary

A study of the Čerenkov light lateral distribution function for cosmic-ray showers with energies of about 1016 eV has been used to determine the distribution of depths of shower maximum at these energies. This distribution has an exponential tail due to fluctuations in the depths of early interactions of the proton primary component. The form of this tail may be used to infer an inelastic proton-air cross-section of (590±70) mb at ≈1016 eV.

PACS. 94.40

Cosmic rays 

Riassunto

Si usa uno studio della distribuzione laterale della luce di Čerenkov per sciami cosmici con energie di circa 1016 eV per determinare la distribuzione di profondità del massimo degli sciami a queste energie. Questa distribuzione ha una coda esponenziale dovuta a fluttuazioni nelle profondità delle prime interazioni della componente protonica delle primarie. La forma di questa coda si può usare per inferire una sezione d'urto anelastica protone-aria di (590±70) mb a ≈1016 eV.

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Copyright information

© Società Italiana di Fisica 1986

Authors and Affiliations

  • B. R. Dawson
    • 1
  • R. W. Clay
    • 1
  • P. G. Edwards
    • 1
  • J. R. Prescott
    • 1
  1. 1.Physics DepartmentUniversity of Adelaide

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