Neutron capture cross section of 18O and its astrophysical implications

Details Neutron capture cross section of 18O and its astrophysical implications Neutron capture cross section of 18O and its astrophysical implications

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvc..53..459m&link_type=abstract

Physical Review C (Nuclear Physics), Volume 53, Issue 1, January 1996, pp.459-468

Physics

Nuclear Physics

16

Spectroscopic Factors And Asymptotic Normalization Coefficients, Radiative Capture, Resonance Reactions, Big Bang Nucleosynthesis

Scientific paper

The neutron capture rate on 18O is of considerable interest in the interpretation of nucleosynthesis in inhomogeneous big bang scenarios and for stellar helium burning in massive red giant stars as well as AGB stars. We measured the reaction cross section of 18O(n,γ)19O at the Forschungszentrum Karlsruhe with a fast cyclic neutron activation technique at laboratory neutron energies of 25, 129, 152, 250, and 370 keV. Direct capture and shell model calculations were performed to interpret the results as well as previous unpublished data. Contributions to the reaction cross section and to the new stellar reaction rate will be discussed.

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