Energies of 1snl (l ≥3) Configurations in He4 i as Calculated from Polarization Theory

Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
William C Martin

Abstract

The calculated singlet-triplet mean energies are given for all He4 i configurations having 3 ≤ l ≤ n - 1 from 4f to 8k. Since only Stark-shifted transitions have been observed for such configurations with l ≥ 4, the calculated positions are the most accurate available. The polarization energy (to the quadrupole approximation) for two-electron ions may be evaluated for higher nl or Z from the simple formulas. The calculated and observed positions of the Isnf configurations in He4 I and Li7 II agree within the experimental uncertainties.

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