Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....7.2947m&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
Scientific paper
Incident ˇCerenkov photon spectra at various observation altitudes are derived after applying wavelength dependent corrections due to attenuation in the atmosphere during their propagation. These spectra are found to be both altitude and primary energy dependent, the peak of which shifts towards shorter wavelength with increasing altitude of observation for a given primary. Also it shifts towards shorter wavelength with increasing primary energy at a given altitude. The fraction of UV component in this spectrum is estimated both for γ- ray and hadron primaries at various observation altitudes and energies. Hadron generated ˇCerenkov spectra are richer in UV light at higher altitudes. Thus the fraction of UV to visible light in the ˇCerenkov spectrum could be a useful parameter to separate γ- rays from cosmic rays specially at lower primary energies.
Abdel Rahman A.-M. M.
Acharya Bobby Samir
Bhat Narayan P.
Chitnis Varsha R.
Majumdar Parthasarathi
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