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Production of $P$-nuclei from $R$-process Seeds: the $\Nu R$-process by Xiong, Zewei; Martínez-Pinedo, Gabriel; Just, Oliver; Sieverding, Andre is a scholarly article available to read on EtoBox.

What is Production of $P$-nuclei from $R$-process Seeds: the $\Nu R$-process about?

We present a new nucleosynthesis process that may take place on neutron-rich ejecta experiencing an intensive neutrino flux. The nucleosynthesis proceeds similarly to the standard $r$-process, a sequence of neutron-captures and beta-decays, however with charged-current neutrino absorption reactions on nuclei operating much faster than beta-decays. Once neutron capture reactions freeze-out the produced $r$-process neutron-rich nuclei undergo a fast conversion of neutrons into protons and are pushed even beyond the $\beta$-stability line producing the neutron-deficient $p$-nuclei. This scenario, which we denote as the $\nu r$-process, provides an alternative channel for the production of $p$-nuclei and the short-lived nucleus $^{92}$Nb. We discuss the necessary conditions posed on the astrophysical site for the $\nu r$-process to be realized in nature. While these conditions are not fulfilled by current neutrino-hydrodynamic models of $r$-process sites, future models, including more complex physics and a larger variety of outflow conditions, may achieve the necessary conditions in some regions of the ejecta.

Author

Xiong, Zewei; Martínez-Pinedo, Gabriel; Just, Oliver; Sieverding, Andre

Published

2023

Language

EN