Počet záznamů: 1

Measurement of the depth of maximum of extensive air showers above 10.sup.18./sup. eV

  1. 1.
    0355260 - FZU-D 2011 RIV US eng J - Článek v odborném periodiku
    Abraham, J. - Abreu, P. - Aglietta, M. - Boháčová, Martina - Chudoba, Jiří - Kárová, Tatiana - Mandát, Dušan - Nečesal, Petr - Nožka, Libor - Nyklíček, Michal - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - Schovancová, Jaroslava - Schovánek, Petr - Šmída, Radomír - Trávníček, Petr
    Measurement of the depth of maximum of extensive air showers above 1018 eV.
    Physical Review Letters. Roč. 104, č. 9 (2010), 091101/1-091101/7 ISSN 0031-9007
    Grant CEP: GA MŠk LC527; GA MŠk(CZ) 1M06002; GA AV ČR KJB100100904; GA AV ČR KJB300100801; GA MŠk(CZ) LA08016
    Výzkumný záměr: CEZ:AV0Z10100502; CEZ:AV0Z10100522
    Klíčová slova: composition * cosmic rays * Pierre Auger Observatory
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 7.621, rok: 2010

    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.
    Trvalý link: http://hdl.handle.net/11104/0194073