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Absorption cross sections of hydrogen ions

by Raezeman
Tags: absorption, cross, hydrogen, ions, sections
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Raezeman
#1
Jul9-14, 08:08 AM
P: 5
hello,

i need the values for the absorption cross sections of positive hydrogen ions for a specific set of wavelengths, Halpha to start with. At first i thought finding this on the web was easy, but turns out to not be trivial at all. If you can help me, i also need the (reliable) source where it comes from, a value alone will help me for a brief moment, but will bring me back to the problem in the long run (i think the scientific community will burn me if i try to publish something like 'i got this value from someone on an online physics forum')
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rigetFrog
#2
Jul9-14, 09:06 AM
P: 112
http://physics.nist.gov/PhysRefData/...ogentable2.htm

you may thank me profusely
Raezeman
#3
Jul9-14, 09:14 AM
P: 5
euhm, this chart seems to just give spectral lines of hydrogen, while what i need are absorption cross sections, i.e. the measure of probability that the hydrogen ion absorbs a photon, this being dependent on the wavelength. I need this for a specific set of photon wavelenghts, one of which being 656.28 angstum (the Halpha line)

rigetFrog
#4
Jul9-14, 09:33 AM
P: 112
Absorption cross sections of hydrogen ions

oops
snorkack
#5
Jul9-14, 11:27 AM
P: 390
Quote Quote by Raezeman View Post
hello,

i need the values for the absorption cross sections of positive hydrogen ions for a specific set of wavelengths, Halpha to start with.
Um, H alpha is the line for neutral hydrogen atom, not positive hydrogen ion!
Raezeman
#6
Jul10-14, 03:18 AM
P: 5
ok wait, i'm getting confused, or mixing up my basic physics, so let me go more broad:
Let's say we have a postiive hydrogen ion being radiated by light with a very broad wavelength range. What wavelengths will get absorbed and what is the corresponding absorption cross section?


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