Physics – Nuclear Physics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icrc....2..792v&link_type=abstract
In: International Cosmic Ray Conference, 14th, Munich, West Germany, August 15-29, 1975, Conference Papers. Volume 2. (A76-26851
Physics
Nuclear Physics
10
Charged Particles, Cosmic Rays, Energy Spectra, Satellite Observation, Time Dependence, Abundance, Carbon, Imp, Neon, Nitrogen, Nuclei (Nuclear Physics), Oxygen, Regression Analysis, Solar Activity Effects
Scientific paper
The charge composition and time variations of quiet-time cosmic rays in the energy range 10 to 25 MeV/nucleon were studied to determine the source of the enhancement of quiet-time intensities of low energy nitrogen and oxygen nuclei observed by Pioneer 10. Time variations were established from data from IMPs 6, 7, and 8; the charge composition was obtained by summing data from IMP 7 and IMP 8. The neon to carbon ratio present in solar rays is too low to explain an observed enhancement of neon. Helium and oxygen have the same percentage modulation for a range of x5 in intensity. This can be explained within the framework of the field-force approximation and the selection mechanism based on the first ionization potential proposed by Fisk et al. (1974) if both oxygen and helium are singly charged.
McDonald Frank B.
von Rosenvinge Tycho T.
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