Neutrino-induced fission and r-process nucleosynthesis

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An r-process scenario with fission but without 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.

Original languageEnglish (US)
Pages (from-to)L103-L106
JournalAstrophysical Journal
Issue number2 II
StatePublished - Apr 20 2002

Bibliographical note

Funding Information:
Discussions with Roberto Gallino, Peter Möller, and Jerry Wasserburg are gratefully acknowledged. I thank the referee, Al Cameron, for many valuable criticisms. This work was supported in part by the Department of Energy under grants DE-FG02-87ER40328 and DE-FG02-00ER41149.


  • Nuclear reactions, nucleosynthesis, abundances
  • Stars: Population II
  • Supernovae: general


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