Abstract
Calculations of the energy levels of atoms and ions with Z ≤ 10 are carried out in this paper using the complex rotation method. Using a new wave function with two terms including a new method to calculate the correlation factor taking into account spherical harmonics through hypergeometric functions to calculate excited 2sns+1,3Se, 2snp+1,3P0, 2pnp+1,3De, 3d4d +1,3Ge states. The results obtained show quantitatively the great significance of electron correlation effects in the doubly excited states. These results are in compliance with some experimental and theoretical data.
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