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Measurement of the depth of maximum of extensive air showers above 10.sup.18./sup. eV
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SYSNO ASEP 0355260 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of the depth of maximum of extensive air showers above 1018 eV Author(s) Abraham, J. (AR)
Abreu, P. (AR)
Aglietta, M. (AR)
Boháčová, Martina (FZU-D) RID, ORCID
Chudoba, Jiří (FZU-D) RID, ORCID
Kárová, Tatiana (FZU-D)
Mandát, Dušan (FZU-D) RID, ORCID
Nečesal, Petr (FZU-D)
Nožka, Libor (FZU-D) RID, ORCID
Nyklíček, Michal (FZU-D)
Palatka, Miroslav (FZU-D) RID, ORCID, SAI
Pech, Miroslav (FZU-D) RID, ORCID
Prouza, Michael (FZU-D) RID, ORCID
Řídký, Jan (FZU-D) RID, ORCID
Schovancová, Jaroslava (FZU-D)
Schovánek, Petr (FZU-D) RID, ORCID
Šmída, Radomír (FZU-D) RID
Trávníček, Petr (FZU-D) RID, ORCIDNumber of authors 18 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 104, č. 9 (2010), 091101/1-091101/7Number of pages 7 s. Language eng - English Country US - United States Keywords composition ; cosmic rays ; Pierre Auger Observatory Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects LC527 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 1M06002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) KJB100100904 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KJB300100801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) LA08016 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100502 - FZU-D (2005-2011) AV0Z10100522 - FZU-D (2005-2011) UT WOS 000275252500006 DOI 10.1103/PhysRevLett.104.091101 Annotation 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 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+35-21) 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
Number of the records: 1