Meteoritic Molybdenum and Ruthenium Isotopic Abundances Document Nucleosynthetic p-process Components
Marti K, Fischer-Gödde M, Proksche C (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 956
Article Number: 7
Journal Issue: 1
Abstract
Anomalies in isotopic abundances of Mo and Ru in solar system matter were found to document variable contributions of the nucleosynthetic s-process component. We report isotopic relations of ϵ 92Mo versus ϵ 100Ru in meteorites from chondritic parent bodies, iron meteorites, and achondrites that reveal deviations from expected s-process abundance variations. We show that two p-process isotopes 92Mo and 94Mo require the presence of distinct p-process components in meteoritic materials. The nucleosynthetic origin of abundant magic (N = 50) p-process nuclides, covering the mass range of Zr, Mo, and Ru, has long been an enigma, but contributions by several recognized pathways, including alpha and νp-antineutrino reactions on protons, may account for the observed relatively large solar system abundances. Specific core-collapse supernovae explosive regions may carry proton-rich matter. Since Mo and Ru isotopic records in solar system matter reveal the presence of more than one nucleosynthetic p-process component, these records are expected to be helpful in documenting different explosive synthesis pathways and the implied galactic evolution of p-nuclides.
Authors with CRIS profile
Involved external institutions
Germany (DE)How to cite
APA:
Marti, K., Fischer-Gödde, M., & Proksche, C. (2023). Meteoritic Molybdenum and Ruthenium Isotopic Abundances Document Nucleosynthetic p-process Components. Astrophysical Journal, 956(1). https://dx.doi.org/10.3847/1538-4357/acee81
MLA:
Marti, Kurt, Mario Fischer-Gödde, and Carina Proksche. "Meteoritic Molybdenum and Ruthenium Isotopic Abundances Document Nucleosynthetic p-process Components." Astrophysical Journal 956.1 (2023).
BibTeX: Download