K
K. M. Simpson
Researcher at University of Adelaide
Publications - 29
Citations - 1822
K. M. Simpson is an academic researcher from University of Adelaide. The author has contributed to research in topics: Cosmic ray & Bethe–Salpeter equation. The author has an hindex of 17, co-authored 29 publications receiving 1772 citations.
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Journal ArticleDOI
Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the High Resolution Fly's Eye experiment.
Rasha Abbasi,Tareq Abu-Zayyad,James F. Amann,G. Archbold,Jose A. Bellido,Konstantin Belov,John Belz,Douglas Bergman,Z. Cao,Roger W Clay,M.D. Cooper,H. Y. Dai,Bruce R. Dawson,A.A. Everett,Yu. A. Fedorova,Julien Girard,R. C. Gray,William Hanlon,C. M. Hoffman,Michael H. Holzscheiter,P. Hüntemeyer,B. F. Jones,C. C. H. Jui,David Kieda,K. Kim,M. A. Kirn,E. C. Loh,N. Manago,L. J. Marek,K. Martens,G. Martin,J. A.J. Matthews,John N. Matthews,J. R. Meyer,S. A. Moore,P. Morrison,A. N. Moosman,J.R. Mumford,M. W. Munro,C. A. Painter,L. Perera,Kevin Reil,R. Riehle,M. D. Roberts,J. S. Sarracino,Misao Sasaki,Steve Schnetzer,P. Shen,K. M. Simpson,G. Sinnis,J. D. Smith,Pierre Sokolsky,C. Song,R. W. Springer,B. T. Stokes,S. Taylor,S. B. Thomas,T.N. Thompson,Gordon Thomson,Dale Tupa,S. Westerhoff,Lawrence Wiencke,T. Vanderveen,A. Zech,Xiang Zhang +64 more
TL;DR: The cosmic ray spectrum is measured using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode to fit the spectrum to a model consisting of galactic and extragalactic sources.
Journal ArticleDOI
Evidence for changing of cosmic ray composition between 10(17) and 10(18) eV from multicomponent measurements
Tareq Abu-Zayyad,Konstantin Belov,D. J. Bird,J. H. Boyer,Z. Cao,M. Catanese,G. F. Chen,Roger W Clay,Corbin Covault,J. W. Cronin,H. Y. Dai,Bruce R. Dawson,J. W. Elbert,Brian Fick,Lucy Fortson,Lucy Fortson,Joseph W. Fowler,K. Gibbs,M. A. K. Glasmacher,K. D. Green,Y. Ho,A. Huang,C. C. H. Jui,M. J. Kidd,David Kieda,B. C. Knapp,S. Ko,C. G. Larsen,Weonjong Lee,E. C. Loh,E. J. Mannel,John Matthews,John Matthews,John N. Matthews,B. J. Newport,D. Nitz,R. A. Ong,K. M. Simpson,J. D. Smith,D. Sinclair,Pierre Sokolsky,Paul Sommers,C. Song,J. K. K. Tang,S. B. Thomas,J. C. van der Velde,Lawrence Wiencke,C. R. Wilkinson,S. Yoshida,X. Z. Zhang +49 more
TL;DR: The results show that the composition is changing from a heavy to lighter mix as the energy increases, and the composition of cosmic rays with primary energies between 10(17) and 10(18) eV has been studied.
Journal ArticleDOI
A Study of the Composition of Ultra-High-Energy Cosmic Rays Using the High-Resolution Fly’s Eye
Rasha Abbasi,Tareq Abu-Zayyad,G. Archbold,G. Archbold,R. W. Atkins,Jose A. Bellido,Konstantin Belov,John Belz,Segev BenZvi,Douglas Bergman,J. H. Boyer,G. W. Burt,Z. Cao,Roger W Clay,B.M. Connolly,Bruce R. Dawson,W. Deng,Y. Fedorova,J. Findlay,C. B. Finley,William Hanlon,Gareth Hughes,P. Hüntemeyer,C. C. H. Jui,K. Kim,M. A. Kirn,B. C. Knapp,E. C. Loh,M. M. Maetas,K. Martens,G. Martin,N. Manago,E. J. Mannel,J. A.J. Matthews,John N. Matthews,A. O’Neill,L. Perera,Kevin Reil,R. Riehle,M. D. Roberts,M. Sasaki,M. Seman,Steve Schnetzer,K. M. Simpson,J. D. Smith,R. Snow,Pierre Sokolsky,C. Song,R. W. Springer,B. T. Stokes,J. R. Thomas,S. B. Thomas,Gordon Thomson,S. Westerhoff,Lawrence Wiencke,A. Zech +55 more
TL;DR: In this article, the authors measured the composition of ultra-high-energy cosmic rays with the High Resolution Fly's Eye cosmic-ray observatory data using the Xmax technique and found the detector resolution was 30 g cm-2 in Xmax and 13% in energy.
Journal ArticleDOI
Measurement of the cosmic-ray energy spectrum and composition from 1017 to 1018.3 eV using a hybrid technique
Tareq Abu-Zayyad,Konstantin Belov,D. J. Bird,J. H. Boyer,Z. Cao,M. Catanese,G. F. Chen,Roger W Clay,Corbin Covault,H. Y. Dai,Bruce R. Dawson,J. W. Elbert,Brian Fick,Lucy Fortson,Joseph W. Fowler,K. Gibbs,M. A. K. Glasmacher,K. D. Green,Y. Ho,A. Huang,C. C. H. Jui,M. J. Kidd,David Kieda,B. C. Knapp,S. Ko,C. G. Larsen,Weonjong Lee,E. C. Loh,E. J. Mannel,John Matthews,John Matthews,John N. Matthews,B. J. Newport,D. Nitz,R. A. Ong,K. M. Simpson,J. D. Smith,D. Sinclair,Pierre Sokolsky,Paul Sommers,C. Song,J. K. K. Tang,S. B. Thomas,J. C. van der Velde,Lawrence Wiencke,C. R. Wilkinson,S. Yoshida,X. Z. Zhang +47 more
TL;DR: In this article, the authors studied 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).
Journal ArticleDOI
Measurement of the Cosmic Ray Energy Spectrum and Composition from 10^{17} to 10^{18.3} eV Using a Hybrid Fluorescence Technique
Tareq Abu-Zayyad,Konstantin Belov,D. J. Bird,J. H. Boyer,Z. Cao,M. A. Catanese,G. F. Chen,Roger W Clay,Corbin Covault,H. Y. Dai,Bruce R. Dawson,J. W. Elbert,Brian Fick,Lucy Fortson,Joseph W. Fowler,K. G. Gibbs,M. A. K. Glasmacher,K. D. Green,Y. Ho,A. Huang,C. C. H. Jui,M. J. Kidd,David Kieda,B. C. Knapp,S. Ko,C. G. Larsen,Weonjong Lee,E. C. Loh,E. J. Mannel,J. A. J. Matthews,John N. Matthews,B. J. Newport,D. Nitz,R. A. Ong,K. M. Simpson,J. D. Smith,D. Sinclair,Pierre Sokolsky,Paul Sommers,C. Song,J. K. K. Tang,S. B. Thomas,J. .van der Velde,L. R. Wiencke,C. R. Wilkinson,S. Yoshida,X. Z. Zhang +46 more
TL;DR: In this paper, the authors studied the spectrum and average mass composition of cosmic rays with primary energies between 10−17 eV and 10−18 eV using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the MIA muon array.