Measurement of the isotopic composition of galactic cosmic ray carbon, nitrogen and oxygen

Conference · Fri Jun 01 04:00:00 EDT 1979

OSTI ID:5983689

Wiedenbeck, M E; Greiner, D E; Bieser, F S; Crawford, H J; Heckman, H H; Lindstrom, P J

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: /sup 13/C/C = 0.067 +- 0.008, /sup 15/N/N = 0.54 +- 0.03, /sup 17/O/O < 0.027, and /sup 18/O/O = 0.019 +- 0.003.

• Research Organization: California Univ., Berkeley (USA). Space Sciences Lab.; California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5983689
• Report Number(s): LBL-8920; CONF-790836-3
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics &amp; Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON
CHEMICAL COMPOSITION
COSMIC NUCLEI
COSMIC RADIATION
CRYOGENIC FLUIDS
DATA
DATA FORMS
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GRAPHS
INFORMATION
INTERPLANETARY SPACE
IONIZING RADIATIONS
ISOTOPE RATIO
NITROGEN
NONMETALS
NUCLEI
NUCLEOSYNTHESIS
NUMERICAL DATA
OXYGEN
RADIATIONS
SPACE
SPACE VEHICLES
TABLES