Computer Science – Sound
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..582t&link_type=abstract
Astrophysical Journal, Part 1, vol. 228, Mar. 1, 1979, p. 582-591.
Computer Science
Sound
9
Abundance, Balloon Sounding, Cosmic Rays, Meteoritic Composition, Nuclei (Nuclear Physics), Balloon-Borne Instruments, Data Reduction, Mass Ratios, Metals, Nuclear Fusion, Solar System
Scientific paper
The relative abundances of Fe, Co, Ni, Cu, and Zn in the cosmic rays have been measured using a large-area balloon-borne electronic detector system. The abundance ratios Ni/Fe and Zn/Fe are 5.0 + or - 0.2% and 0.06 + or - 0.01%, respectively. The Zn abundance is low (40%) compared with the Cameron (1973) (C1) solar system, and is best consistent with the solar system C2 meteorite abundances. The ratios Co/Fe and Cu/Fe, extrapolated to the top of the atmosphere, are 0.68 + or - 0.14% and 0.066 + or - 0.030% respectively; since charge peaks are not resolved at Co and Cu, these results are taken as upper limits of 0.8% and 0.1%, respectively. The Co upper limit is consistent with complete decay of Co-57 at the source and implies a lower limit of 2 years for the time between nucleosynthesis and acceleration of these nuclei.
Israel Martin H.
Klarmann J.
Love P. L.
Tueller Jack
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