Helium atom

Annotation We are about to discuss atom of helium and define it's energy and wave function. To find the exact solution of this problem is impossible. For solving the problem we use three approximate method: 1. Perturbative treatment 2. Variational treatment 3. “Exact” treatment Each method calculated the total energy of an atom of helium. The most Inaccurate result has given us Perturbative treatment, relatively better - variational Method, the most exact result has given us so-called "exact" method. Approximate Method Result Experimental Result Perturbative treatment −5.5 −5.8074 Variational treatment −5.751 ”Exact” treatment −5.8074