Using perturbation theory methods and a variational method, we have calculated the energy of a twodimensional helium atom in its lower excited states, this energy showing itself to be practically independent of the specific characteristics of these excited states; this, together with the known value of the energy in the ground state, found earlier by one of the authors, presents the fundamental possibility of determining the frequencies of the main spectral lines of such an atom, which can be checked experimentally.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 43–47, September, 2018.
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Skobelev, V.V., Kopylov, S.V. Energy of a Two-Dimensional Helium Atom in an Excited State. Russ Phys J 61, 1597–1602 (2019). https://doi.org/10.1007/s11182-018-1576-2
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DOI: https://doi.org/10.1007/s11182-018-1576-2