2023-06-21 15:00  P7F/Online

[Journal Club] A new aspect of nucleosynthesis: νr-process – create p-nuclei from r-process seed

Mr. Le-Ren Chen

Nucleosynthesis is the process about how a new element is produced from its predecessor nuclei, and yet its nature is still not fully understood. In Dr. Zewei Xiongs recent article [arXiv:2305.11050], a new synthesis process named the "νr-process" is proposed. This process involves a neutron-rich seed (as the r-process seed) experiencing an intensive neutrino flux, which then proceeds to the neutron-deficient p-nuclei. During the process, early freeze-out occurs as charged-current neutrino absorption is faster than the β-decay rate, then pushing the nuclei beyond the β-stability line as neutrons are converted into protons by neutrinos. The aim of this process is to provide an alternative channel for the production of p-nuclei, with a particular focus on narrowing down the origin of the short-lived nucleus Nb92. Although the current model may not fully support the conditions of this process, this article provides insights into the possible site and necessary conditions for its occurrence, and in the future work they may achieved in some regions of the ejecta.