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Measurement of the Depth of Maximum of Extensive Air Showers above 1018 eV
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Measurement of the Depth of Maximum of Extensive Air Showers above 1018 eV
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| The Pierre Auger Collaboration; Pastor Carpi, Sergio | |||
| This document is a artículoDate2010 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/48002 |
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| 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. | |||
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The Pierre Auger Collaboration Pastor Carpi, Sergio 2010 Measurement of the Depth of Maximum of Extensive Air Showers above 1018 eV Physical Review Letters 104 9 091101-1 091101-7 |
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| http://dx.doi.org/10.1103/PhysRevLett.104.091101 |
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