RT Journal Article
T1 Measurement of the depth of maximum of extensive air showers above 10(18) eV
A1 Arganda, E.
A1 Arqueros Martínez, Fernando
A1 Blanco Ramos, Francisco
A1 García Pinto, Diego
A1 Monasor, M.
A1 Ortiz Ramis, Montserrat
A1 Rosado Vélez, Jaime
A1 Vázquez Peñas, José Ramón
AB We describe the measurement of the depth of maximum, X-max, of the longitudinal development of air showers induced by cosmic rays. Almost 4000 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 d24 +/- 3 g/cm(2)/ecade 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.
PB American Physical Society
SN 0031-9007
YR 2010
FD 2010-03-05
LK https://hdl.handle.net/20.500.14352/45138
UL https://hdl.handle.net/20.500.14352/45138
LA eng
NO © 2010 American Physical Society.Autoría conjunta: Pierre Auger Collaboration. Artículo firmado por más de 10 autores.The successful installation and commissioning of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malargüe. We are very grateful to the following agencies and organizations for financial support: Comisión Nacional de Energía Atómica, Fundación Antorchas, Gobierno De La Provincia de Mendoza, Municipalidad de Malargüe, NDM Holdings and Valle Las Leñas, in gratitude for their continuing cooperation over land access, Argentina; the Australian Research Council; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundação de Amparo à Pesquisa do Estado de Rio de Janeiro (FAPERJ), Fundacão de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Ministério de Ciencia e Tecnologia (MCT), Brazil; AVCR AV0Z10100502 and AV0Z10100522, GAAV KJB300100801 and KJB100100904, MSMT-CR LA08016, LC527, 1M06002, and MSM0021620859, Czech Republic; Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS), Conseil Régional Ile-de-France, D´epartement Physique Nucléaire et Corpusculaire (PNC-IN2P3/CNRS), Département Sciences de l’Univers (SDU-INSU/CNRS), France; Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Finanzministerium Baden-Württemberg, Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Ministerium für Wissenschaft und Forschung, Nordrhein-Westfalen, Ministerium für Wissenschaft, Forschung und Kunst, BadenWürttemberg, Germany; Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell’Istruzione, dell’Universit`a e della Ricerca (MIUR), Italy; Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico; Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organ isatie voor Wetenschappelijk Onderzoek (NWO), Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands; Ministry of Science and Higher Education, Grant Nos. 1 P03 D 014 30, N202 090 31/0623, and PAP/218/2006, Poland; Fundacão para a Ciencia e a Tecnologia, Portugal; Ministry for Higher Education, Science, and Technology, Slovenian Research Agency, Slovenia; Comunidad de Madrid, Consejería de Educación de la Comunidad de Castilla La Mancha, FEDER funds, Ministerio de Ciencia e Innovación, Xunta de Galicia, Spain; Science and Technology Facilities Council, United Kingdom; Department of Energy, Contract Nos. DEAC02-07CH11359, DE-FR02-04ER41300, National Science Foundation, Grant No. 0450696, The Grainger Foundation USA; ALFA-EC / HELEN, European Union 6th Framework Program, Grant No. MEIF-CT-2005- 025057, European Union 7th Framework Program, Grant No. PIEF-GA-2008-220240, and UNESCO.
NO Unión Europea. FP7
NO Czech Republic
NO Centre de Calcul IN2P3/CNRS
NO Centre National de la Recherche Scientifique (CNRS)
NO Conseil Régional Ile-de-France
NO D´epartement Physique Nucléaire et Corpusculaire (PNC-IN2P3/CNRS)
NO Département Sciences de l’Univers (SDU-INSU/CNRS)
NO Bundesministerium für Bildung und Forschung (BMBF)
NO Deutsche Forschungsgemeinschaft (DFG)
NO Finanzministerium Baden-Württemberg
NO Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)
NO Ministerium für Wissenschaft und Forschung, Nordrhein-Westfalen
NO Ministerium für Wissenschaft, Forschung und Kunst, BadenWürttemberg
NO Istituto Nazionale di Fisica Nucleare (INFN)
NO Ministero dell’Istruzione, dell’Universit`a e della Ricerca (MIUR)
NO Ministerie van Onderwijs, Cultuur en Wetenschap, Netherlands
NO Nederlandse Organ isatie voor Wetenschappelijk Onderzoek (NWO)
NO Stichting voor Fundamenteel Onderzoek der Materie (FOM)
NO Ministry of Science and Higher Education
NO Fundacão para a Ciencia e a Tecnologia
NO Ministry for Higher Education, Science, and Technology
NO Slovenian Research Agency
NO Comunidad de Madrid
NO Consejería de Educación de la Comunidad de Castilla La Mancha
NO FEDER funds
NO Ministerio de Ciencia e Innovación, Xunta de Galicia
NO Science and Technology Facilities Council
NO ALFA-EC / HELEN
NO Unión Europea. FP6
NO UNESCO
DS Docta Complutense
RD 19 abr 2025