A measurement of the isotopic composition of galactic cosmic ray carbon, nitrogen and oxygenThe paper reports the results of an investigation of the isotopic composition of galactic cosmic ray carbon, nitrogen and oxygen (80-230 MeV/amu) made using the U.C. Berkeley HKH instrument aboard the ISEE-3 spacecraft. The combination of high mass resolution and a large statistical sample makes possible a precise determination of the relative isotopic abundances for these elements. In local interplanetary space the following values are found: C-13/C = 0.067 + or - 0.008, N-15/N = 0.54 + or - 0.03, O-17/O less than 0.027, and O-18/O - 0.019 + or - 0.003.
Document ID
19810027997
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Wiedenbeck, M. E. (California Univ. Berkeley, CA, United States)
Greiner, D. E. (California Univ. Berkeley, CA, United States)
Bieser, F. S. (California Univ. Berkeley, CA, United States)
Crawford, H. J. (California Univ. Berkeley, CA, United States)
Heckman, H. H. (California Univ. Berkeley, CA, United States)
Lindstrom, P. J. (California, University Berkeley, Calif., United States)