Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..348c&link_type=abstract
Astrophysical Journal, Part 1, vol. 252, Jan. 1, 1982, p. 348-355. Research supported by the University of Oklahoma
Astronomy and Astrophysics
Astrophysics
24
Helium, Neutron Sources, Nuclear Fusion, Particle Production, Stellar Evolution, Thermal Neutrons, Abundance, Heavy Elements, Photodissociation, Radioactive Decay, Supernovae
Scientific paper
One or more processes of the type of the rapid neutron capture process (r-process) have been responsible for synthesizing the neutron-rich heavy nuclei. It has been assumed that the r-process must be associated in some way with supernova explosions. However, recent work has suggested that a nonsupernova site should also be considered as a possibility for an r-process. The results of the present investigation demonstrate the possibility that an r-process can occur as a result of a thermal runaway process in a degenerate helium gas, with C-13 providing both the energy and the neutron source. It is found that the general character of the r-process abundance distribution can be reproduced, starting with a solar system abundance distribution of the heavy elements, if a series of localized flashes takes place in the helium region, with mixing throughout the region between flashes, or in a single flash if the neutron source is sufficiently strong.
Cameron G. W. A.
Cowan John J.
Truran Jame. W.
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