Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies
The TRACER instrument (“Transition Radiation Array for Cosmic Energetic Radiation”) has been developed for direct measurements of the heavier primary cosmic-ray nuclei at high energies. The instrument had a successful long-duration balloon flight in Antarctica in 2003. The detector system and measur...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.245.7612 2023-05-15T13:52:24+02:00 Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies M. Ave P. J. Boyle F. Gahbauer A J. R. Hör El C M. Ichimura D D. Müller A. Romero Wolf E The Pennsylvania State University CiteSeerX Archives 801 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.7612 http://arxiv.org/pdf/0801.0582v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.7612 http://arxiv.org/pdf/0801.0582v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/0801.0582v1.pdf text ftciteseerx 2016-01-07T19:26:50Z The TRACER instrument (“Transition Radiation Array for Cosmic Energetic Radiation”) has been developed for direct measurements of the heavier primary cosmic-ray nuclei at high energies. The instrument had a successful long-duration balloon flight in Antarctica in 2003. The detector system and measurement process are described, details of the data analysis are discussed, and the individual energy spectra of the elements O, Ne, Mg, Si, S, Ar, Ca, and Fe (nuclear charge Z=8 to 26) are presented. The large geometric factor of TRACER and the use of a transition radiation detector make it possible to determine the spectra up to energies in excess of 10 14 eV per particle. A power-law fit to the individual energy spectra above 20 GeV per amu exhibits nearly the same spectral index ( ∼ 2.65 ± 0.05) for all elements, without noticeable dependence on the elemental charge Z. Text Antarc* Antarctica Unknown |
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The TRACER instrument (“Transition Radiation Array for Cosmic Energetic Radiation”) has been developed for direct measurements of the heavier primary cosmic-ray nuclei at high energies. The instrument had a successful long-duration balloon flight in Antarctica in 2003. The detector system and measurement process are described, details of the data analysis are discussed, and the individual energy spectra of the elements O, Ne, Mg, Si, S, Ar, Ca, and Fe (nuclear charge Z=8 to 26) are presented. The large geometric factor of TRACER and the use of a transition radiation detector make it possible to determine the spectra up to energies in excess of 10 14 eV per particle. A power-law fit to the individual energy spectra above 20 GeV per amu exhibits nearly the same spectral index ( ∼ 2.65 ± 0.05) for all elements, without noticeable dependence on the elemental charge Z. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M. Ave P. J. Boyle F. Gahbauer A J. R. Hör El C M. Ichimura D D. Müller A. Romero Wolf E |
spellingShingle |
M. Ave P. J. Boyle F. Gahbauer A J. R. Hör El C M. Ichimura D D. Müller A. Romero Wolf E Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies |
author_facet |
M. Ave P. J. Boyle F. Gahbauer A J. R. Hör El C M. Ichimura D D. Müller A. Romero Wolf E |
author_sort |
M. Ave |
title |
Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies |
title_short |
Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies |
title_full |
Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies |
title_fullStr |
Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies |
title_full_unstemmed |
Astrophysical Journal Composition of Primary Cosmic-Ray Nuclei at High Energies |
title_sort |
astrophysical journal composition of primary cosmic-ray nuclei at high energies |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.7612 http://arxiv.org/pdf/0801.0582v1.pdf |
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Antarc* Antarctica |
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Antarc* Antarctica |
op_source |
http://arxiv.org/pdf/0801.0582v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.7612 http://arxiv.org/pdf/0801.0582v1.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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