Other
Scientific paper
Jul 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..200n&link_type=abstract
Astrophysical Journal, Part 1, vol. 215, July 1, 1977, p. 200-207.
Other
4
Mass Ratios, Nuclear Fusion, Oxygen Isotopes, Stellar Models, Abundance, Carbon, Nitrogen, Oxygen 17, Oxygen 18, Reaction Kinetics, Stellar Structure
Scientific paper
High-temperature CNO burning has been studied in an attempt to discover a process that would simultaneously produce O-18 and O-17 in the same ratio, but in larger amounts, than occurs in the sun. The temperature and density dependence of the thermonuclear evolution was investigated by performing calculations for various constant temperature and density conditions. For conditions considered possibly characteristic of novae, supermassive stars, and outer zones of supernovae, substantial simultaneous overproduction (relative to the solar system value) of mass 17 and 18 nuclei was indicated, but the concomitant overproduction of mass 15 nuclei would greatly exceed the production of the other nuclei. Also, it is thought that hydrodynamic freeze-out would decrease the O-18 to O-17 ratio. It is concluded that hot CNO burning probably is unable to account for the high O-18 to O-17 ratio
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