Measurement of the depth of maximum of extensive air showers above 1018eV

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 1018eV observed by the fluorescence detector of the Pierre Auger Observatory in coincidence with at least one surface detector station are select...

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Autor principal:	Multitudinario:476
Formato:	JOUR
Materias:	Cosmic ray measurement Cosmology Fluorescence Air showers Extensive air showers Fluorescence detector Mass composition Pierre Auger observatory Surface detectors Cosmic rays
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00319007_v104_n9_p_Multitudinario
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00319007_v104_n9_p_Multitudinario
record_format	dspace
spelling	todo:paper_00319007_v104_n9_p_Multitudinario2023-10-03T14:42:07Z Measurement of the depth of maximum of extensive air showers above 1018eV Multitudinario:476 Cosmic ray measurement Cosmology Fluorescence Air showers Extensive air showers Fluorescence detector Mass composition Pierre Auger observatory Surface detectors Cosmic rays 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 1018eV 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. 05eV, and (24±3)g/cm2/decade above this energy. The measured shower-to-shower fluctuations decrease from about 55 to 26g/cm2. The interpretation of these results in terms of the cosmic ray mass composition is briefly discussed. © 2010 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00319007_v104_n9_p_Multitudinario
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cosmic ray measurement Cosmology Fluorescence Air showers Extensive air showers Fluorescence detector Mass composition Pierre Auger observatory Surface detectors Cosmic rays
spellingShingle	Cosmic ray measurement Cosmology Fluorescence Air showers Extensive air showers Fluorescence detector Mass composition Pierre Auger observatory Surface detectors Cosmic rays Multitudinario:476 Measurement of the depth of maximum of extensive air showers above 1018eV
topic_facet	Cosmic ray measurement Cosmology Fluorescence Air showers Extensive air showers Fluorescence detector Mass composition Pierre Auger observatory Surface detectors Cosmic rays
description	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 1018eV 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. 05eV, and (24±3)g/cm2/decade above this energy. The measured shower-to-shower fluctuations decrease from about 55 to 26g/cm2. The interpretation of these results in terms of the cosmic ray mass composition is briefly discussed. © 2010 The American Physical Society.
format	JOUR
author	Multitudinario:476
author_facet	Multitudinario:476
author_sort	Multitudinario:476
title	Measurement of the depth of maximum of extensive air showers above 1018eV
title_short	Measurement of the depth of maximum of extensive air showers above 1018eV
title_full	Measurement of the depth of maximum of extensive air showers above 1018eV
title_fullStr	Measurement of the depth of maximum of extensive air showers above 1018eV
title_full_unstemmed	Measurement of the depth of maximum of extensive air showers above 1018eV
title_sort	measurement of the depth of maximum of extensive air showers above 1018ev
url	http://hdl.handle.net/20.500.12110/paper_00319007_v104_n9_p_Multitudinario
work_keys_str_mv	AT multitudinario476 measurementofthedepthofmaximumofextensiveairshowersabove1018ev
_version_	1782029529060999168

Measurement of the depth of maximum of extensive air showers above 1018eV

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