Cosmic-ray energy spectra between 10 and several hundred GeV per atomic mass unit for elements from Ar-18 to Ni-28 - Results from HEAO 3

Details Cosmic-ray energy spectra between 10 and several hundred GeV per atomic mass unit for elements from Ar-18 to Ni-28 - Results from HEAO 3 Cosmic-ray energy spectra between 10 and several hundred GeV per atomic mass unit for elements from Ar-18 to Ni-28 - Results from HEAO 3

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324.1106b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 15, 1988, p. 1106-1117.

Astronomy and Astrophysics

Astrophysics

26

Cosmic Rays, Energetic Particles, Energy Spectra, Heao 3, Heavy Ions, Abundance, Cerenkov Radiation, Extraterrestrial Radiation, Spacecraft Contamination

Scientific paper

Data from the Heavy-Nuclei Experiment (HNE) flown on HEAO 3 are used to determine the abundances relative to 26Fe of the individual elements 18Ar, 19K, 20Ca, 21Sc, 22Ti, 23V, and 28Ni as a function of energy from 10 to several hundred GeV per amu. It is shown that the primary elements Ni and Fe have nearly constant relative abundances over the interval 10 to ≡500 GeV per amu. While this result implies an energy-independent source composition over this energy interval, it appears that the Ni/Fe ratio at these high energies is appreciably larger than that at ≡1 GeV per amu. Individual secondary elements, which are derived principally from interactions of primary Fe nuclei, display a power-law decrease in relative abundance up to ≡150 GeV per amu.

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