Neutrinos, Fission Cycling, and the r-process

Details Neutrinos, Fission Cycling, and the r-process Neutrinos, Fission Cycling, and the r-process

2006-07-10

arxiv.org/abs/astro-ph/0607180v2

PoSNIC-IX:140,2006

Astronomy and Astrophysics

Astrophysics

Typos corrected. Presented at NIC-IX, International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IX, CERN, Genev

Scientific paper

It has long been suggested that fission cycling may play an important role in the r-process. Fission cycling can only occur in a very neutron rich environment. In traditional calculations of the neutrino driven wind of the core-collapse supernova, the environment is not sufficiently neutron rich to produce the r-process elements. However, we show that with a reduction of the electron neutrino flux coming from the supernova, fission cycling does occur and furthermore it produces an abundance pattern which is consistent with observed r-process abundance pattern in halo stars. Such a reduction can be caused by active-sterile neutrino oscillations or other new physics.

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