Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (37) (Citation History)
· Refereed Citations to the Article
· Reads History
· Translate This Page
Energy spectra of cosmic-ray nuclei from 50 to 2000 GeV per AMU
Grunsfeld, John M.; L'Heureux, Jacques; Meyer, Peter; Muller, Dietrich; Swordy, Simon P.
AA(Chicago, University, IL), AB(Chicago, University, IL), AC(Chicago, University, IL), AD(Chicago, University, IL), AE(Chicago, University, IL)
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 327, April 1, 1988, p. L31-L34. (ApJL Homepage)
Publication Date:
Space Radiation
NASA/STI Keywords:
Cosmic Rays, Energy Spectra, Heavy Nuclei, Spectral Energy Distribution, Abundance, Atomic Spectra, Cerenkov Radiation, Spacelab
Bibliographic Code:


A direct measurement of the elemental composition of cosmic rays up to energies of several TeV/amu was performed during the Spacelab 2 flight of the Space Shuttle. Results on the spectral shape for the elements C, O, Ne, Mg, Si, and Fe, obtained from this experiment, are presented. It was found that the C and O energy spectra retain a power-law spectrum in energy with an exponent Gamma of about 2.65. The Fe spectrum is flatter (Gamma of about 2.55) up to a particle energy of about 10 to the 14th eV, indicating a steady increase in the relative abundance of iron in cosmic rays up to this energy. The energy spectra of Ne, Mg, and Si are steeper than anticipated. This behavior is unexpected within current models of cosmic-ray acceleration.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints