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Proc Natl Acad Sci U S A. 1996 Jan 23;93(2):646-8.

Substructure of the inner core of the Earth.

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Herndon Science and Software, Inc., San Diego, CA 92131, USA.


The rationale is disclosed for a substructure within the Earth's inner core, consisting of an actinide subcore at the center of the Earth, surrounded by a subshell composed of the products of nuclear fission and radioactive decay. Estimates are made as to possible densities, physical dimensions, and chemical compositions. The feasibility for self-sustaining nuclear fission within the subcore is demonstrated, and implications bearing on the structure and geodynamic activity of the inner core are discussed.

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