Measurement of the Depth of Maximum of Extensive Air Showers above 10^18 eV (CROSBI ID 157238)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Abraham, J. ; ... ; Antičić, Tome ; ... ; Kadija, Krešo ; ... ; Mićanović, Saša ; ... ; Šuša, Tatjana ; ... ; Ziolkowski, M.
engleski
Measurement of the Depth of Maximum of Extensive Air Showers above 10^18 eV
We describe the measurement of the depth of maximum, Xmax, of the longitudinal development of air showers induced by cosmic rays. Almost four thousand events above 10^18 eV observed by the fluorescence detector of the Pierre Auger Observatory in coincidence with at least one surface detector station are selected for the analysis. The average shower maximum was found to evolve with energy at a rate of (106+35 −21) g/cm^2/decade below 10^(18.24±0.05) eV and (24±3) g/cm^2/decade above this energy. The measured shower-to-shower fluctuations decrease from about 55 to 26 g/cm^2. The interpretation of these results in terms of the cosmic ray mass composition is briefly discussed.
Pierre Auger Observatory; depth of maximum; fluorescence detector; cosmic rays
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Podaci o izdanju
104 (9)
2010.
091101-1-091101-7
objavljeno
0031-9007
10.1103/PhysRevLett.104.091101