Please use this identifier to cite or link to this item:
https://repositorio.ufba.br/handle/ri/5863
metadata.dc.type: | Artigo de Periódico |
Title: | Measurement of the Depth of Maximum of Extensive Air Showers above 1018 eV |
Other Titles: | Physical Review Letters |
Authors: | Abraham, J. Abreu, P. Aglietta, M. Ahn, E. J. Allard, D. Allekotte, I. Allen, J. Pepe, Iuri Muniz |
metadata.dc.creator: | Abraham, J. Abreu, P. Aglietta, M. Ahn, E. J. Allard, D. Allekotte, I. Allen, J. Pepe, Iuri Muniz |
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. |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/5863 |
Issue Date: | 5-Mar-2010 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
(21)e091101.pdf | 210,75 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.