(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

using first-order perturbation theory ,estimate the correction to the ground state energy of a hydrogenic atom due to the finite size of the nucleus, assume it's spherical nucleus.

2. Relevant equations

you can employ the fact that the electrostatic potential fi

fi=Ze/R(3/2-r^/2R^ ,if r<R

=Ze/r ,if r>R

fi is elctrostatic potential

R is radius, chargeZe

3. The attempt at a solution

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# Hydrogenic atom

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