The isotopic composition of the anomalous low-energy cosmic rays

Details The isotopic composition of the anomalous low-energy cosmic rays The isotopic composition of the anomalous low-energy cosmic rays

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...283..450m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 1, 1984, p. 450-456.

Astronomy and Astrophysics

Astrophysics

19

Energy Spectra, Galactic Cosmic Rays, Interstellar Matter, Isotopes, Abundance, Anomalies, Particle Energy, Stellar Winds

Scientific paper

Measurements of the isotopes of low energy cosmic ray He, C, N, O and Ne nuclei are analyzed, in concert with previous data, to examine relationships between galactic cosmic rays (GCR) and anomalous cosmic rays (ACR), which could arise from either extragalactic or interstellar sources. A ground-based heavy isotope spectrometer telescope was used for the survey, along with IMP-7 and IMP-8 data and ISEE-3 data. The data were recorded from 1973-78. Spectral and abundance data are provided for each element. Fragmentation was absent in the ACR data, unlike the GCR data. Differences were also observed in the Ne-22/Ne-20 ratios of ACR and GCR. It is suggested, therefore, that the low energy ACR isotopes have an interstellar origin and are useful for studies of the local interstellar medium.

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