[Pw_forum] add or remove electron energy

[nazari at iasbs.ac.ir]

>
 Please  study  about the definition of Ionization energy and Electron
affinity. You can find your answer.



> Dear All
> I add one electron to an isolated atom and the difference in
> E(n+1)-E(n)=-0.09 Ryd but when I remove an electron from this atom
> I got E(n)-E(n-1)=-0.349 Ryd.
> what is the reason for this difference? I think that this behavior is same
> for every system.
> Thanks a lot
> Ali Kazempour
> Physics Department, Isfahan University of Technology
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