What are the properties of electron gas in the Sun?

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Discussion Overview

The discussion revolves around the properties of electron gas in the Sun, particularly in relation to ionized hydrogen atoms, energy levels in nuclear reactions, and the dynamics of particle interactions in the solar core. Participants explore various aspects including temperature, pressure, and energy distributions, as well as specific reactions occurring in the Sun.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether electrons in the Sun exist in a separate gas state due to ionized hydrogen atoms and seeks information on the properties of this gas, such as temperature and velocity distribution.
  • Another participant provides a link to a Wikipedia page for basic information, suggesting it as a reference.
  • There is a discussion about the kinetic energy associated with the proton-proton (pp) chain reactions, with one participant asserting that 12.86 MeV is kinetic energy, while another expresses uncertainty about the energy distribution in the reaction involving deuterium and hydrogen.
  • Participants debate the meaning of the statement regarding the frequency of the pp chain reactions, with one suggesting that it refers to a specific type of reaction occurring at that rate, while acknowledging the complexity of the chain's event rates.
  • In the context of electron-positron annihilation, one participant claims that the incoming kinetic energy is negligible compared to the outgoing energy of the gamma photons, while noting that this holds true only if the particles' kinetic energies are low.

Areas of Agreement / Disagreement

Participants express uncertainty and differing interpretations regarding the energy distributions in nuclear reactions and the implications of the proton-proton chain's reaction rates. No consensus is reached on these points.

Contextual Notes

Participants highlight the complexity of the reactions involved in the proton-proton chain and the potential variations in event rates, indicating that assumptions about energy distributions may depend on specific conditions.

mersecske
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Hydrogen atoms are in ionised state in the Sun?
So the electrons are in a separate gas state?
If, yes, than what is the main properties of that gas:
temperature, partial pressure, velocity distribution, etc.
Can somebody give me a good reference or answers?
 
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In the pp I branch 12.86 MeV is kinetic energy?

And in the reaction
D + H -> He + gamma + 5.49 MeV
5.49 MeV is mostly the energy of gamma?
 
and what does it mean
"The proton–proton chain occurs around 9.2×1037
times each second in the core of the Sun."
I don't understand, because the pp chain consists several reaction with different event rate, as I know.
 
In electron positron annihilation in the core of the Sun
the incoming kinetic energy of electrons and positrons are negligible to the outcoming kinetic energy 511keV/gamma?
 
mersecske said:
In the pp I branch 12.86 MeV is kinetic energy?

And in the reaction
D + H -> He + gamma + 5.49 MeV
5.49 MeV is mostly the energy of gamma?

I believe the 12.86 MeV is kinetic energy.
I am unsure of the 5.49 MeV. I'm sure that there is some recoil, but I could see most of that as the energy of the gamma.

mersecske said:
and what does it mean
"The proton–proton chain occurs around 9.2×1037
times each second in the core of the Sun."
I don't understand, because the pp chain consists several reaction with different event rate, as I know.

Looks like they mean that some type of P-P chain occurs at that rate. For each chain there is a certain % chance that it will occur, and multiplying all the percents against the overal events per second will give you the average amount of each chain that occurs per second.

mersecske said:
In electron positron annihilation in the core of the Sun
the incoming kinetic energy of electrons and positrons are negligible to the outcoming kinetic energy 511keV/gamma?

Yes. It is mostly the rest mass that is converted into the energies of the gamma's. But that is only if the kinetic energies of the particles is low. If they were moving at say 1 MeV each, that would be a different story.
 

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