Two-neutron capture reactions in supernovae neutrino bubbles

Details Two-neutron capture reactions in supernovae neutrino bubbles Two-neutron capture reactions in supernovae neutrino bubbles

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvc..52.2231g&link_type=abstract

Physical Review C (Nuclear Physics), Volume 52, Issue 4, October 1995, pp.2231-2235

Physics

Nuclear Physics

29

Radiative Capture, Resonance Reactions, 3H-, 3He-, And 4He-Induced Reactions, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

Recent calculations suggest that the neutrino heated bubbles in the postcollapse phase of type II supernovae may be the site of the r process. The nucleosynthesis process depends on the expansion and cooling rates as well as on the rates of the α-particle and neutron recombination processes that bridge the mass gaps at A = 5 and 8. We have reexamined the rate for the important reaction 4He(αn,γ)9Be, and estimated the rates for the two neutron capture reactions on 6He and 8He which could provide an alternative reaction path. We find that the most important reaction for initiating the α process is the 4He(αn,γ)9Be reaction, as suggested by earlier work.

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