Physics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.6021o&link_type=abstract
Journal of Geophysical Research, vol. 85, Nov. 1, 1980, p. 6021-6024. Research supported by the Swiss National Science Foundati
Physics
9
Abundance, Helium Ions, Helium Isotopes, Satellite Observation, Solar Wind, International Sun Earth Explorer 3, Mass Spectrometers, Solar Corona, Solar Wind Velocity
Scientific paper
The ion composition experiment aboard the Isee 3 spacecraft has been used to measure the He-4(2+)/He-3(2+) ratio in the solar wind. Using 4334 observations made between Aug. 18 and Nov. 24, 1978, and March 24 and Aug. 25, 1979, the average ratio He-4(2+)/He-3(2+) was 2.1 + or - 0.2 x 1000, in agreement with previous foil measurements. Individual observations vary widely from the average and the low He-4(2+)/He-3(2+) ratios occur at times of low He-4(2+) flux.
Bochsler Peter
Coplan Michael A.
Geiss Johannes
Ogilvie Keith. W.
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