Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251l..27m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 251, Dec. 1, 1981, p. L27-L31.
Astronomy and Astrophysics
Astrophysics
21
Abundance, Cosmic Rays, Galactic Radiation, Heavy Nuclei, Interstellar Matter, Isotopes, Boron, Carbon, High Resolution, Nitrogen, Nuclear Fusion, Oxygen, Solar System
Scientific paper
High resolution measurements are presented for the elemental and isotopic composition of galactic cosmic ray B, C, N, and O nuclei with about 30-130 MeV/nucleon. The isotopes are separately resolved, and the resulting abundances are limited by statistical rather than systematic uncertainties. N is found to be significantly depleted in the cosmic ray source with respect to the solar system and local interstellar medium, and it is concluded that the N-14/O-16 limit is inconsistent with models in which a majority of cosmic rays are accelerated interstellar material.
Mewaldt Richard A.
Spalding J. D.
Stone Edward C.
Vogt Rochus E.
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