Measurement of the cosmic ray composition at the knee with the SPASE-2/AMANDA-B10 detectors

6533b82dfe1ef96bd12913ee

RESEARCH PRODUCT

Measurement of the cosmic ray composition at the knee with the SPASE-2/AMANDA-B10 detectors

T. Messarius M. Solarz A. Silvestri Freddy Binon T. Burgess S. Böser J. P Dewulf P. B. Price A. C. Pohl Y. Minaeva R. Schwarz Hakki ÖGelman J. Rodríguez Martino Kyle T. Mandli I. Taboada D. Bertrand T. O. B. Schmidt J. Ahrens K. Rawlins D. J. Boersma A. Biron Kurt Woschnagg P. Ekström R. Nahnhauer M. Hellwig Matthias Leuthold Paul Evenson D. R. Nygren E. Andres H. G. Sander P. Steffen C. P. Mcparland Dmitry Chirkin Michael Stamatikos James Madsen Jan Conrad T. Feser R. Porrata T. Deyoung T. Deyoung Staffan Carius I. Liubarsky M. Ribordy Xinhua Bai L. Gerhardt A. Goldschmidt Gerald Przybylski Glenn Spiczak D. Ross R. Engel K.-h. Becker K. H. Sulanke B. Hughey T. Neunhöffer R. Hardtke T. Becka M. Gaug James Kim Albrecht Karle R. Morse R. C. Bay P. Niessen Todor Stanev Yajun Wang S. Schlenstedt R. Ganugapati D. Hubert C. Wiedemann Olga Botner D. Steele C. Walck Ph. Herquet S. Tilav P. C. Mock D. F. Cowen Marek Kowalski P. Miocinovic Kael Hanson Thomas K. Gaisser G. B. Yodh L. Köpke Paolo Desiati Ph. Olbrechts H. Leich C. Pérez De Los Heros T. Castermans Wolfgang Rhode C. De Clercq Christopher Wiebusch Markus Ackermann S. W. Barwick Othmane Bouhali W. Wu David A. Schneider G. C. Hill Heiko Geenen Pawel Marciniewski Anna Davour Janet Jacobsen Wolfgang Wagner P. O. Hulth H. Wissing Elisa Bernardini Jim Hinton R. G. Stokstad R. Wischnewski P. Lindahl Christian Spiering S. Hundertmark K. Rochester K. Kuehn Alan Watson J. I. Lamoureux K. Schinarakis Jodi Cooley T. Hauschildt K. Hultqvist S. Young T. Miller J. Lloyd-evans Adam Bouchta S. Richter H. S. Matis Allan Hallgren Francis Halzen E. Dickinson Elisa Resconi

subject

Astroparticle physics Physics Astrophysics::High Energy Astrophysical Phenomena Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Cosmic ray Astrophysics Cosmic Rays; Mass composition; Neutrino astronomy Mass composition Cosmic Rays Atomic mass Air shower Neutrino astronomy Ultra-high-energy cosmic ray Neutrino Neutrino astronomy Cherenkov radiation

description

The mass composition of high-energy cosmic rays at energies above 1015 eV can provide crucial information for the understanding of their origin. Air showers were measured simultaneously with the SPASE-2 air shower array and the AMANDA-B10 Cherenkov telescope at the South Pole. This combination has the advantage to sample almost all high-energy shower muons and is thus a new approach to the determination of the cosmic ray composition. The change in the cosmic ray mass composition was measured versus existing data from direct measurements at low energies. Our data show an increase of the mean log atomic mass 〈lnA〉 by about 0.8 between 500 TeV and 5 PeV. This trend of an increasing mass through the "knee" region is robust against a variety of systematic effects. © 2004 Elsevier B.V. All rights reserved.

year	journal	country	edition	language
2004-09-01	Astroparticle Physics

https://doi.org/10.1016/j.astropartphys.2004.04.007