The low-energy galactic cosmic ray carbon, nitrogen, and oxygen isotopic composition

Details The low-energy galactic cosmic ray carbon, nitrogen, and oxygen isotopic composition The low-energy galactic cosmic ray carbon, nitrogen, and oxygen isotopic composition

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..695g&link_type=abstract

Astrophysical Journal, Part 1, vol. 244, Mar. 1, 1981, p. 695-710.

Astronomy and Astrophysics

Astrophysics

15

Abundance, Carbon Isotopes, Cosmic Rays, Galactic Radiation, Nitrogen Isotopes, Oxygen Isotopes, Calibrating, Explorer 47 Satellite, Explorer 50 Satellite, Extrapolation

Scientific paper

It is found that C, N, and O elemental and isotopic ratios in the galactic cosmic rays measured near the earth with the IMP 7 telescope of the University of Chicago have had the values N/O = 0.25 + or 0.02; C/O = 1.06 + or - 0.03; C-13/C = 0.04-0.10; N-15/N = 0.47 + or - 0.06; and O-18/O less than or equal to 0.03. It is noted that these results are confirmed by IMP 8 measurements. The measurements are extrapolated back to the cosmic ray source using exponential and truncated exponential path length distributions whose parameters have been determined by fitting cosmic ray B/C and sub-Fe/Fe ratios measured previously.

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