Neutrino-Induced Fission and r-Process Nucleosynthesis

Details Neutrino-Induced Fission and r-Process Nucleosynthesis Neutrino-Induced Fission and r-Process Nucleosynthesis

2002-03-13

arxiv.org/abs/astro-ph/0203194v1

Astrophys.J. 569 (2002) L103-L106

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures, to appear in ApJL

Scientific paper

10.1086/340643

An r-process scenario with fission but no fission cycling is considered to account for the observed abundance patterns of neutron-capture elements in ultra-metal-poor stars. It is proposed that neutrino reactions play a crucial role in inducing the fission of the progenitor nuclei after the r-process freezes out in Type II Supernovae. To facilitate neutrino-induced fission, the proposed r-process scenario is restricted to occur in a low-density environment such as the neutrino-driven wind from the neutron star. Further studies to develop this scenario are emphasized.

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