出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：It has long been suggested that ssion 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 sufciently neutron
rich to produce the r-process elements. However, we show that with a reduction of the electron
neutrino ux coming from the supernova, ssion 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.
