Working Paper Hypothesis Version 4 This version is not peer-reviewed

Hypothesis and Feasible Mechanism for Appearance of Post-Post-Fe Nuclei in Solar System

Version 1 : Received: 25 September 2018 / Approved: 25 September 2018 / Online: 25 September 2018 (08:47:51 CEST)
Version 2 : Received: 26 November 2018 / Approved: 28 November 2018 / Online: 28 November 2018 (04:57:01 CET)
Version 3 : Received: 14 April 2019 / Approved: 16 April 2019 / Online: 16 April 2019 (11:44:32 CEST)
Version 4 : Received: 21 July 2019 / Approved: 23 July 2019 / Online: 23 July 2019 (11:17:56 CEST)

A peer-reviewed article of this Preprint also exists.

Tito, E.P.; Pavlov, V.I. Hypothesis about Enrichment of Solar System. Physics 2020, 2, 213-276. Tito, E.P.; Pavlov, V.I. Hypothesis about Enrichment of Solar System. Physics 2020, 2, 213-276.


Conventional models do not fully explain composition of the solar system – for example, the presence of p-nuclei and post-post-Fe-nuclei remains not yet understood (and is one of the great unresolved puzzles of nuclear astrophysics in general); other puzzles exist. We offer a hypothesis which can explain the appearance of non-native elements in the solar system, and a feasible scenario for its implementation. The hypothesis suggests that a nuclear-fission "event" occurred in the inner part of the solar system at the time currently defined as the birth of the system. Conventional models have never considered fission as a contributing nuclei-production mechanism. Upon examination of the existing models and factual data (presented in volumes of publications but never combined into an aggregate), we identified one plausible scenario by which a fission event (not demolishing the entire solar system) could occur: an encounter with a compact super-dense stellar "fragment" (with specific properties) and its "explosion" in fission-cascades. Such scenario also helps resolve other long-standing puzzles of the solar system. For example, it provides that the fission-produced nuclei subsequently transformed into the material that (eventually) accreted into the "rocky" objects in the system (terrestrial planets, asteroids, etc.) and enriched the pre-existed hydrogen-helium objects (the Sun and the gaseous giants) – this offers an explanation for the planets’ inner position and compositional differences within the predominantly hydrogen-helium rest of the solar system. Other implications also follow.


Hypothesis, Fission, Heavy Post-Post-Fe Elements, Solar System


Physical Sciences, Astronomy and Astrophysics

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