Fine structure, and hyperfine structure

[Denver Dang]

Hello...

I was just reading about that, and I have one question.
In the chapter I've jut read about, the overall headline is about one electron atoms, so I was just wondering, since the overall equation got Z (Atomic number) in it, if this was for larger atoms as well, or ONLY one electron atoms, or maybe even Helium as well ?

I hope you know what I mean :)


Regards.

 

[dlgoff]

I picked up my old "atomic spectra & atomic structure" book by Gerhard Herzberg and is says:

Spectra of hydrogen-like ions. Taking Z=2... gives the spectrum which would be emitted by an electron moving about a nucleus with charge 2; that is, the spectrum of He⁺. Analogously, for Z=3 and Z=4, we obtain the spectra of Li⁺⁺ and Be⁺⁺⁺.

 

[Denver Dang]

But they have one electron as well, since they are ionized, don't they ?
I mean, would it also count for a two electron system, or is that completely different ?

 

[Bob S]

I think the equations apply only to nuclei with only one electron: For example, the ionization energy of a carbon nucleus with only one electron is 6² x 13.6 eV. This would be a C⁺⁺⁺⁺⁺ ion.

Bob S