Energy eigenvalues of helium-like atoms in dense plasmas

Calculations based on a variational method with wavefunctions including the correlation of electrons are carried out to obtain the energy eigenvalues of the Schrödinger equation for helium-like atoms embedded in dense plasmas, using the Debye-Hückel approximation. Energy eigenvalues for the 1 ¹S, 2 ¹S and 2 ³S states are obtained as a function of Debye screening length.