Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment

H. S. Ahn; P. S. Allison; M. G. Bagliesi; J. J. Beatty; G. Bigongiari; P. J. Boyle; T. J. Brandt; J. T. Childers; N. B. Conklin; S. Coutu; M. A. Duvernois; O. Ganel; J. H. Han; H. J. Hyun; J. A. Jeon; K. C. Kim; J. K. Lee; M. H. Lee; L. Lutz; P. Maestro; A. Malinin; P. S. Marrocchesi; S. A. Minnick; S. I. Mognet; S. Nam; S. L. Nutter; I. H. Park; N. H. Park; E. S. Seo; R. Sina; S. P. Swordy; S. P. Wakely; J. Wu; J. Yang; Y. S. Yoon; R. Zei; S. Y. Zinn

doi:10.1016/j.astropartphys.2008.07.010

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arXiv · 0808.1718

Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment

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Abstract

We present new measurements of heavy cosmic-ray nuclei at high energies per- formed during the first flight of the balloon-borne cosmic-ray experiment CREAM (Cosmic-Ray Energetics And Mass). This instrument uses multiple charge detectors and a transition radiation detector to provide the first high accuracy measurements of the relative abundances of elements from boron to oxygen up to energies around 1 TeV/n. The data agree with previous measurements at lower energies and show a relatively steep decline (~E$^-0.6$ to E$^-0.5$) at high energies. They further show the source abundance of nitrogen relative to oxygen is ~10% in the TeV/n region.

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H. S. Ahn, P. S. Allison, M. G. Bagliesi, J. J. Beatty, G. Bigongiari, P. J. Boyle, T. J. Brandt, J. T. Childers, N. B. Conklin, S. Coutu, M. A. Duvernois, O. Ganel, J. H. Han, H. J. Hyun, J. A. Jeon, K. C. Kim, J. K. Lee, M. H. Lee, L. Lutz, P. Maestro, A. Malinin, P. S. Marrocchesi, S. A. Minnick, S. I. Mognet, S. Nam, S. L. Nutter, I. H. Park, N. H. Park, E. S. Seo, R. Sina, S. P. Swordy, S. P. Wakely, J. Wu, J. Yang, Y. S. Yoon, R. Zei, S. Y. Zinn. 2008-08-12. Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment. https://doi.org/10.1016/j.astropartphys.2008.07.010

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