Publication Date:
2014-05-04
Description:
The nucleosynthesis in core-collapse supernovae resulting from interaction of the neutrino flux with 4 He can contribute to the light element production (such as Li and B) and under favourable conditions to the origin of heavier nuclides belonging to the weak r -process component right up to the mass number A 130. Here we investigate possibility of considerable contribution of the neutrino– 4 He interaction to the weak r -process component. We assume that a large-scale convective mixing could occur between the He and C–O–Ne shells in core-collapse supernovae. In that case some 4 He would be exposed to the neutrino radiation at a radius smaller than that predicted for He shell by standard pre-supernova models. Our calculations demonstrate that for metal-poor stars the neutrino contribution to creation of the weak r -process component becomes noticeable in case 4 He is dragged down at radii R 10 9 cm.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
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