Table 14. Comparison of excitation energy of Nsns 1,3Se (N = 3 – 5 and n = 4 – 6) resonances of helium-like ions (Z = 2 – 5) with some experimental and theoretical results. Our excitation energies are obtained with respect to the accurate ground-state energies of Frankowski and Pekeris . The figures in the last three columns show the absolute deviation of the excitation energy from the reference values shown in columns 5, 6 and 7

From

Doubly-Excited ^1,3S^e, ^1,3P⁰, ^1,3D^e, ^1,3F⁰ and ^1,3G^e Resonances States of Two-Electron Atoms below the N = 3 – 8 Hydrogenic Thresholds

M.T. Gning, I. Sakho

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