Nucleosynthesis in Neutron Rich Supernova Ejecta

Details Nucleosynthesis in Neutron Rich Supernova Ejecta Nucleosynthesis in Neutron Rich Supernova Ejecta

Feb 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971ap%26ss..10..203d&link_type=abstract

Astrophysics and Space Science, Volume 10, Issue 2, pp.203-226

Astronomy and Astrophysics

Astrophysics

38

Scientific paper

A nuclear reaction network of 903 different, strong and electromagnetic reactions, linking 107 chemical constituents is used to study the elements synthesized in the neutron rich material, ejected in supernova explosions. A large number of three body reactions virtually eliminates the usual bottle neck at theA=5 mass gap. For initially high temperatures and densities,T=1010K and ϱ=7×108 gm/cm3, with expansion time scales of 10-3 10-2 sec, three differentn top ratios,n/p=4,n/p=3/2, andn/p˜1, are considered for the ejected matter. In all three cases, the material synthesized is preponderantly heavy. For then/p=4 model, the conditions at the charged particle freeze-out are ideal for the ‘r-process’. The onset of this rapid neutron capture phase is explicitly shown with a sequence of time lapse abundance plots.

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