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Updated: Apr 14, 2026

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
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Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 15, 2013

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早期地球的一种类似水星的成分在核心和高地幔中产生 (142) Nd Nd

Anke Wohlers1, Bernard J Wood1

  • 1Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK.

Nature
|April 17, 2015
PubMed
概括

地球的核心可能是其不寻常的元素组成的关键. 核心形成可以解释地幔的高萨马与新比率 (Sm/Nd),并为地球气体提供一个缺失的热源.

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Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
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The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
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