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An experiment was performed to observe and analyze the isotopic components of low energy light nuclei, especially beryllium, in cosmic rays. Plastic sheets consisting of 50 layers of Daicel and Kodak cellulose nitrate (CN) were flown from Fort Churchill, Canada in 1971 for this purpose. The theoretical and experimental results, as well as their analysis, are presented in this report.
The results of an investigation of the isotopic composition of galactic cosmic ray carbon, nitrogen and oxygen (E approx. 80 to 230 MeV/amu) made using the U.C. Berkeley HKH instrument aboard the ISEE-3 spacecraft are reported. 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 we find: 13C/C = 0.067 +- 0.008, 15N/N = 0.54 +- 0.03, 17O/O