Computer Science
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sciam.247..108m&link_type=abstract
Scientific American, vol. 247, Dec. 1982, p. 108, 109, 111 (7 ff.).
Computer Science
Abundance, Cosmic Rays, Galactic Radiation, Heavy Nuclei, Isotopic Enrichment, Milky Way Galaxy, Alpha Particles, Elementary Particle Interactions, International Sun Earth Explorer 3, Nuclear Fusion, Silicon Radiation Detectors, Solar System, Supernovae
Scientific paper
The instrumentation and results of observations using the ISEE-3 spacecraft for viewing isotopic abundances in the Galaxy are described. The ISEE-3 carries two spectrometers comprised of 10 sq cm Si detectors. Placed in orbit at a Lagrangian point, the instrument platform gathers cosmic ray data on particles travelling between 25-75% light speed. The kinetic energy lost to the detectors as the particles strike them results in a measurable electric current, reflective of the mass of the particles. The spacecraft orbits the sun and is therefore free of the earth's magnetic field, allowing Galactic measurements on a continuous basis. The discussion centers around nuclei that can be built from alpha particles, i.e., Ne, Mg, and Si. It has been found that cosmic ray abundances differ from solar system abundances in a way that suggests CNO abundance enhancements in regions where cosmic rays arise.
Mewaldt Richard A.
Stone Edward C.
Wiedenbeck Mark E.
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