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I consider the qm-derivation of the electronic states of hydrogen.

There are two different derivations (I consider only the coulomb-force):

1) the proton is very heavy, so one can neglect the movement

2) the proton moves a little bit, so one uses the relative mass ##\mu##

The derivation for the 1) case is easy.

Where is the physical difference at the end of the calculations for case 1) or 2)?

Do both Hamiltonians lead to the same result?

Thank you very much!!!

Greez Abby

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# Difference of Hydrogen Hamiltonian with relative mass particles

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