Measurement of the cosmic-ray energy spectrum and composition from 1017to 1018.3 eV using a hybrid technique

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dc.contributor.authorAbu-Zayyad, T.
dc.contributor.authorBelov, K.
dc.contributor.authorBird, D.
dc.contributor.authorBoyer, J.
dc.contributor.authorCao, Z.
dc.contributor.authorCatanese, M.
dc.contributor.authorChen, G.
dc.contributor.authorClay, R.
dc.contributor.authorCovault, C.
dc.contributor.authorDai, H.
dc.contributor.authorDawson, B.
dc.contributor.authorElbert, J.
dc.contributor.authorFick, B.
dc.contributor.authorFortson, L.
dc.contributor.authorFowler, J.
dc.contributor.authorGibbs, K.
dc.contributor.authorGlasmacher, M.
dc.contributor.authorGreen, K.
dc.contributor.authorHo, Y.
dc.contributor.authorHuang, A.
dc.contributor.authoret al.
dc.date.issued2001
dc.description© 2001. The American Astronomical Society
dc.description.abstractWe study the spectrum and average mass composition of cosmic rays with primary energies between 1017 and 1018 eV using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the Michigan Muon Array (MIA). Measurements have been made of the change in the depth of shower maximum as a function of energy. A complete Monte Carlo simulation of the detector response and comparisons with shower simulations leads to the conclusion that the cosmic-ray intensity is changing from a heavier to a lighter composition in this energy range. The spectrum is consistent with earlier Fly's Eye measurements and supports the previously found steepening near 4 × 1017 eV.
dc.description.statementofresponsibilityT. Abu-Zayyad, K. Belov, D. J. Bird, J. Boyer, Z. Cao, M. Catanese, G. F. Chen, R. W. Clay, C. E. Covault, H. Y. Dai, B. R. Dawson, J. W. Elbert, B. E. Fick, L. F. Fortson, J. W. Fowler, K. G. Gibbs, M. A. K. Glasmacher, K. D. Green, Y. Ho, A. Huang, C. C. Jui, M. J. Kidd, D. B. Kieda, B. C. Knapp, S. Ko, C. G. Larsen, W. Lee, E. C. Loh, E. J. Mannel, J. Matthews, J. N. Matthews, B. J. Newport, D. F. Nitz, R. A. Ong, K. M. Simpson, J. D. Smith, D. Sinclair, P. Sokolsky, P. Sommers, C. Song, J. K. K. Tang, S. B. Thomas, J. C. van der Velde, L. R. Wiencke, C. R. Wilkinson, S. Yoshida, and X. Z. Zhang
dc.identifier.citationThe Astrophysical Journal (ApJ), 2001; 557(2 Part 1):686-699
dc.identifier.doi10.1086/322240
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.orcidClay, R. [0000-0002-9040-9648]
dc.identifier.orcidDawson, B. [0000-0002-4271-3055]
dc.identifier.urihttp://hdl.handle.net/2440/12438
dc.language.isoen
dc.publisherUniv Chicago Press
dc.source.urihttps://doi.org/10.1086/322240
dc.subjectcosmic rays
dc.subjectISM: abundances
dc.titleMeasurement of the cosmic-ray energy spectrum and composition from 1017to 1018.3 eV using a hybrid technique
dc.typeJournal article
pubs.publication-statusPublished

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