Hydrogen - Halpha cross section

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Discussion Overview

The discussion revolves around the absorption cross section for H-alpha photons by hydrogen atoms, specifically in the neutral hydrogen state with n=2. The inquiry is related to a project requiring accurate data and reliable sources.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • Raezeman requests the absorption cross section for H-alpha photons absorbed by neutral hydrogen in the n=2 state, emphasizing the need for a reliable source.
  • Another participant questions Raezeman's prolonged search for this information, suggesting a lack of progress over several months.
  • Raezeman acknowledges previous mistakes in earlier threads and indicates that while they have written code related to the problem, they still require the exact value for the absorption cross section.
  • Raezeman clarifies that they specifically need the absorption cross section per hydrogen atom.

Areas of Agreement / Disagreement

The discussion does not present a consensus, as participants express varying levels of frustration and urgency regarding the request for information, but no specific answers or solutions have been provided.

Raezeman
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Greetings,

i need the absorption cross section for the absorption of an H-alpha photon by a hydrogen atom, in the correct state of course, which I'm pretty sure is neutral hydrogen, n=2. I am needing this for a project, so i also need a reliable source where this comes from.

Thanks beforehand and friendly regards,
Raezeman
 
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Haven't you been looking for this since July, have you not seen anything in the 5 months since?
 
Vagn said:
Haven't you been looking for this since July, have you not seen anything in the 5 months since?
Sort of. I wrote some code about this which technically works, i just need the exact number, but then a lot of other stuff came up that i had to do first, so i left searching for this value for later, which is now. And as i actually made lots of mistakes in my first thread, i thought better make a new one.
But please, someone who can help me?
 
Also, to be more precise, its the absorption cross section per hydrogen atom that i need.
 

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