Abstract
Despite significant progress in the understanding of galactic nucleosynthesis and its influence on the solar system neighborhood, challenges remain in the understanding of enrichment of the solar system itself. Based on the detailed review of multi-disciplinary literature, we propose a scenario that an event of nucleogenesis—not nucleosynthesis (from lower nucleon numbers A to higher A) but nuclear-fission (from higher A to lower A)—occurred in the inner part of the solar system at one of the stages of its evolution. We propose a feasible mechanism of implementation of such event. The occurrence of such event could help explain the puzzles in yet-unresolved isotopic abundances, certain meteoritic anomalies, as well as peculiarities in the solar system’s composition and planetary structure. We also discuss experimental data and available results from existing models (in several relevant sub-fields) that provide support and/or appear consistent with the hypothesis.
Highlights
Significant progress in the understanding of galactic nucleosynthesis and its influence on the solar system neighborhood has been achieved over recent decades, but challenges remain in the understanding of enrichment of the solar system itself
In view of the above-mentioned findings, regardless of whether or not the proposed enrichment mechanism is a meaningful contributor to the galactic nucleogenesis, the mechanism—if impacted the solar system—may be rather meaningful for the evolution of our home system, and it is worth contemplation
The hypothesis includes presumptions that (1) the solar system was formed before the event and initially had only giant objects, and (2) the nuclear-fission products from the event evolved into the “rocky” objects in the system and enriched the pre-existed hydrogen-helium objects
Summary
Significant progress in the understanding of galactic nucleosynthesis and its influence on the solar system neighborhood has been achieved over recent decades, but challenges remain in the understanding of enrichment of the solar system itself. Despite the widely-held belief that the solar system evolution is well-understood, numerous unsolved puzzles persist, among them are: the “excess” of p-elements, the bi-modal planetary structure of the solar system, the “solar modeling problem”, various meteoritic anomalies, and more. In this paper we propose a scenario of how a nuclear-fission event could occur in the inner part of the solar system at one of the stages of its evolution The occurrence of such event could help explain the yet-unresolved puzzles in isotopic abundances and certain meteoritic anomalies
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