Investigation of longitudinal and lateral age parameter of extensive air showers

Document Type : Full length research Paper

Author

scientific member-shahid bahonar kerman university

Abstract

Colliding high energy cosmic rays to the earth atmosphere produces secondary particles which generate extensive air shower (EAS) that develops in lateral and longitudinal directions. It was found that electron density in two directions is related to the age parameter. Dai et. al. [1] clarified the difference between the lateral and longitudinal age parameters in 1990. However, some scientists believe that the lateral age parameter from NKG model is not sufficient to describe the electro lateral dispersion. In the current study, given the experimental and simulation data and also given the results of Dai et. al. work, the dependence of the lateral and longitudinal age parameter to core distance is investigated. Finally, contrary to NKG theory, at Linsley theory, the age parameter is not a constant parameter, so it increases with an increase in core distance.

Keywords

References

[1] K. Kamata, J .Nishimura, The Lateral and the Angular Structure Functions of Electron Showers, Progress of theoretical physics, 6 (1958) 93-155.
[2] N.N. Efimov, T.A. Egorov, D.D. Hrasilnikov, M.I. Pravdin, world data center of Yakutsk array catalog (1988).
 
[3] H. Bethe, Moliere`s theory of multiple scattering, Physical review 89 (1953) 1256.

[4] K. Greisen, Cosmic ray showers, Annual Review of Nuclear and Particle Science, 10 (1960) 63-108.

[5] J. Linsley, Structure of large air showers at depth 834 g/cm2, Proceedings of the 15th International Cosmic Ray Conference, Plovdiv, Bulgaria, 89 (1977) 56-62.
[6] A. Tapia, D. Melo, F. Sánchez, A.Sedoski Croce, A. Etchegoyen, J. M.Figueira, R.F. Gamarra, B. García, N.González, M. Josebachuili, D. Ravignani, I.Sidelnik, B. Wundheiler, The lateral shower age parameter as an estimator of chemical composition, Proceedings of the 33rd International Cosmic Ray Conference, Rio de Janeiro, Brazil (2013)1-4.

[7] H.Y. Dai, Y.D. He, A.X. Huo, A contradiction in the concept of shower age, Proceedings of the 21st International Cosmic Ray Conference, Adelaide, Australia, 9 (1990) 5-8.

Journal of Research on Many-body Systems
Volume 6, Issue 12
December 2017
Pages 67-71

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History

  • Receive Date: 01 August 2015
  • Revise Date: 15 June 2016
  • Accept Date: 19 June 2016

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