Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...221..161j&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 221, no. 1, Aug. 1989, p. 161-179.
Astronomy and Astrophysics
Astrophysics
39
Carbon Isotopes, Neutron Sources, Nuclear Astrophysics, Protons, Stellar Composition, Abundance, Helium Atoms, Nuclear Fusion, Oxygen Atoms, Stellar Mass
Scientific paper
The production of neutrons from C-13(alpha,n)O-16 is explored, and four different regimes in the concomitant nucleosynthesis process are identified which are characterized by different relative values of the lifetimes of the ingested protons against capture by C-12, of N-13 against beta-decay, and of C-13 against alpha captures. The less efficient regimes for heavy element synthesis are shown to be those producing the highest amounts of rare light isotopes, such as N-15, O-17, and F-19. Simple analytic approximations for three of these regimes are proposed which have application to the prediction of the number of neutrons captured by heavy seed nuclei in a given stellar environment, as well as the associated N-14 yield.
Arnould Marcel
Jorissen Alain
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