Cosmic-Ray Proton and Helium Spectra: Results from

Measurements are presented of the cosmic ray hydrogen and helium spectra at energies from 2 to 800 TeV. The experiments were performed on a series of twelve balloon flights, including several long duration Australia-to-South America and Antarctic circumpolar flights. No clear evidence is seen for a...

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Bibliographic Details
Main Authors: K. Asakimori, T. H. Burnett, M. L. Cherry, K. Chevli, M. J. Christl, S. Dake, J. H. Derrickson, W. F. Fountain, M. Fuki, J. C. Gregory, T. Hayashi, R. Holynski, J. Iwai, A. Iyono, J. Johnson, M. Kobayashi, J. Lord, O. Miyamura, W. Wolter, H. Yokomi, E. Zager
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 1998
Subjects:
Antarctic
Antarc*
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.507.3482
http://marge.phys.washington.edu/jacee/Papers/ApJ_p_FHe.pdf
Description
Summary:Measurements are presented of the cosmic ray hydrogen and helium spectra at energies from 2 to 800 TeV. The experiments were performed on a series of twelve balloon flights, including several long duration Australia-to-South America and Antarctic circumpolar flights. No clear evidence is seen for a spectral break. Both the hydrogen and helium spectra are consistent with power laws over the entire energy range, with integral spectral indices 1.80 0.04 and.06.041.68 for the protons and helium respectively. The results are fully consistent with expectations based on supernova shock acceleration coupled with a “leaky box ” model of propagation through the Galaxy. 1.

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