Where do the electrons go? (in stellar nuclear fusion)

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Discussion Overview

The discussion centers around the behavior of electrons during stellar nuclear fusion and their fate within stars, particularly in the context of cosmic ray production. Participants explore the mechanisms of fusion, the nature of stellar plasma, and the implications for understanding cosmic rays.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Thies Kohl expresses uncertainty about the fate of electrons in stars, questioning whether they remain inside until a star explodes or if they are expelled but do not reach Earth.
  • One participant notes that the solar wind is electrically neutral, suggesting a connection to the behavior of particles in stellar environments.
  • Another participant mentions that charged particles remain in the vicinity due to electromagnetic forces, emphasizing the plasma state of the sun.
  • A later reply explains that fusion products do not appear at the surface of the sun in their energetic form, but rather as neutral particles or plasma, due to the electric fields involved.
  • The concept of 'ambipolar diffusion' is recommended as a starting point for understanding the interactions of ions and electrons in stellar contexts.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific fate of electrons in stars, and multiple viewpoints regarding their behavior and the nature of stellar plasma are presented.

Contextual Notes

There are limitations in the discussion regarding assumptions about the behavior of particles in stellar environments and the definitions of terms like 'neutral plasma' and 'ambipolar diffusion'.

Thies_Kohl
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TL;DR
I have got a question about the function of stars and how nuclear fusion and the release of cosmic rays work in particular.
I have to give a presentation about natural Radiation and I am very happy about it because it includes Astrophysics. I want to explain to my audience how the stars produce cosmic rays. I thought about explaining to them how nuclear fusion and that kind of stuff works but then I realized that I have got a big gap in knowledge. I didn't know what happens to the electrons inside the star because they aren't released like the neutrons and protons. Where do they go? Do they stay inside the star until it explodes`? Are they send out but they just don't reach Earth and other planets? What happens with the electrons? I hope that anyone of you can explain to me how that works.
Sincerely Thies Kohl
 
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Charged particles move fast, but because of electro-magetism, they just stay around. The sun is a big ball of plasma.
 
Thies_Kohl said:
Summary:: I have got a question about the function of stars and how nuclear fusion and the release of cosmic rays work in particular.

I have to give a presentation about natural Radiation and I am very happy about it because it includes Astrophysics. I want to explain to my audience how the stars produce cosmic rays. I thought about explaining to them how nuclear fusion and that kind of stuff works but then I realized that I have got a big gap in knowledge. I didn't know what happens to the electrons inside the star because they aren't released like the neutrons and protons. Where do they go? Do they stay inside the star until it explodes`? Are they send out but they just don't reach Earth and other planets? What happens with the electrons? I hope that anyone of you can explain to me how that works.
Sincerely Thies Kohl
Everything fusion-wise stays inside the 'baking pot' of the Sun's core.

What you see on the surface is 'hot stuff' that is at ~6000K or so, and is hot because it is the result of the exothermic fusion process products working their way to the surface, by which time they have thermalised with the solar plasma.

You do not see 'energetic fusion products' at the surface, just hydrogen and the 'fusion products' that have cooled and worked their way to the surface. The Sun is a big lump of plasma with ions and electrons fully dissociated.

If matter leaves the surface of the Sun, it will leave it in a neutral form, either as neutral particles or as a neutral plasma (equal mix of electrons and ions).

This is because of the electric field between them which keeps them held together.

I recommend you look up 'ambipolar diffusion' as your starter on this.
 

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