What Causes Deuterium Fusion in Massive Planets?

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Discussion Overview

The discussion centers on the conditions necessary for deuterium fusion in massive planets, specifically addressing the threshold mass of approximately 13 Jupiters and the role of gravitational fields in facilitating fusion by overcoming the Coulomb barrier. The scope includes theoretical considerations of fusion processes in astrophysical contexts.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants propose that the gravitational field of a planetary body must be strong enough to provide the necessary conditions for fusion, specifically by giving molecules sufficient kinetic energy to overcome the Coulomb barrier.
  • Others argue that it is not solely kinetic energy but rather the combined effects of pressure and temperature that enable atoms to overcome the Coulomb barrier for fusion.
  • A later reply reiterates the initial claim about the role of kinetic energy, asserting that it is indeed the primary factor in overcoming the Coulomb barrier.

Areas of Agreement / Disagreement

Participants express differing views on the mechanisms behind deuterium fusion, with some emphasizing kinetic energy while others highlight the importance of pressure and temperature. The discussion remains unresolved regarding the exact contributions of these factors.

Contextual Notes

There are limitations in the discussion regarding the definitions of kinetic energy, pressure, and temperature in the context of fusion, as well as the assumptions about the conditions required for fusion to initiate.

NoobixCube
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I have often seen it quoted that above the mass of 13 Jupiters, Deuterium fusion is able to begin. Is this because the gravitational field of the planetary body is strong enough to give the molecules enough kinetic energy to overcome the Coulomb barrier and fuse?
 
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Yes, although not quite kinetic energy. The pressure and temperature push the atoms together and overcome the coloumb barrier.
 
Thanks!
 
NoobixCube said:
I have often seen it quoted that above the mass of 13 Jupiters, Deuterium fusion is able to begin. Is this because the gravitational field of the planetary body is strong enough to give the molecules enough kinetic energy to overcome the Coulomb barrier and fuse?

Yes, this is correct. It is not "not quite" kinetic energy, it is very much exactly kinetic energy.
 

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