Year: 2025
Type: article
Abstract: The enigmatic origin of the proton-rich nuclei 92Mo and 94Mo in the solar system remains one of the most intriguing mysteries in astrophysics, with the definitive production site yet to be identified. Although mechanisms such as the proton-capture reactions, photonuclear reactions, and neutrino processes have been proposed, the underproduction of 94Mo persists as a puzzle. In this study, we investigate the production of 94Mo through neutrino-induced processes during core-collapse supernova explosions. By calculating the cross sections of the charged-current reactions 94Zr (ν e , e −)94Nb and 95Mo (ν e , e −p)94Mo, as well as the neutral-current reactions 95Mo ( ν , ν ′ n)94Mo, based on supernova explosion models, we explore the contribution of neutrino-nucleus reactions to the abundance of 94Mo. Our results indicate that these neutrino-induced reactions can account for up to 6.8% of the solar system abundance of 94Mo. Additionally, we propose that specific temperatures and proton number densities formed by neutrino shock waves could reproduce the solar system abundance ratio of 94Mo to 92Mo. This work provides a new perspective on understanding the origin of p-process nuclei in the solar system and establishes a significant theoretical foundation for future research endeavors.
Source: The Astrophysical Journal
Authors: N. Song, Z. H. Li, G. X. Li, Z. C. Gao, Y. F. Niu
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Awards: G7565135484, G83040541
OpenAlex ID: W4413440557