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https://hdl.handle.net/2440/61284
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Type: | Journal article |
Title: | Measurement of the depth of maximum of extensive air showers above 10¹⁸ eV |
Other Titles: | Measurement of the depth of maximum of extensive air showers above 10(18) eV |
Author: | Barber, K. Cooper, M. Dawson, B. Holmes, V. |
Citation: | Physical Review Letters, 2010; 104(9):091101-1-091101-7 |
Publisher: | American Physical Soc |
Issue Date: | 2010 |
ISSN: | 0031-9007 1079-7114 |
Statement of Responsibility: | J. Abraham... K. B. Barber... M. J. Cooper... B. R. Dawson... V. C. Holmes... et al.(Pierre Auger Collaboration) |
Abstract: | We describe the measurement of the depth of maximum, Xmax, of the longitudinal development of air showers induced by cosmic rays. Almost 4000 events above 10¹⁸ 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 (106-₂₁⁺³⁵) g/cm2/decade below 10¹⁸.²⁴±⁰.⁰⁵ eV, and (24±3) g/cm²/decade above this energy. The measured shower-to-shower fluctuations decrease from about 55 to 26 g/cm². The interpretation of these results in terms of the cosmic ray mass composition is briefly discussed. |
Keywords: | Pierre Auger Collaboration |
Rights: | ©2010 American Physical Society |
DOI: | 10.1103/PhysRevLett.104.091101 |
Published version: | http://dx.doi.org/10.1103/physrevlett.104.091101 |
Appears in Collections: | Aurora harvest 5 Physics publications |
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hdl_61284.pdf | Published version | 232.54 kB | Adobe PDF | View/Open |
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