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Volume 353 - International Conference on Precision Physics and Fundamental Physical Constants (FFK2019) - Poster session
Nonrelativistic ionization energy levels of the helium atom
D. Aznabayev,* D.A.A.B. Vladimir Korobov
*corresponding author
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Pre-published on: 2019 October 15
Published on:
Abstract
The nonrelativistic ionization energy levels of a helium atom are calculated for S, P, D, and F states. The
calculations are based on the variational method of “exponential” expansion. The convergence of the calculated
energy levels is studied as a function of the number of basis functions N. This allows us to claim that the obtained
energy values (including the values for the states with a nonzero angular momentum) are accurate up to 28–35
significant digits.
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