Question

explain normal helium atom for perturbed systcm ​

Answer 1

Answer:

Helium atom is a three particle system (2 electrons and one nucleus) for which the Schrödinger equation cannot be solved exactly. Therefore, we use here perturbation theory in first order to solve helium atom Schrödinger equation.

Answer 2

Answer:

Perturbation method

= 0.90 a.u. (≅ 24.6 eV). The energy that we obtained is too low because the repulsion term between the electrons was ignored, whose effect is to raise the energy levels. As Z gets bigger, our approach should yield better results, since the electron-electron repulsion term will get smaller.