Lowest ten 1 P Rydberg states of beryllium calculated with all-electron explicitly correlated Gaussian functions

Monika Stanke, Sergiy Bubin, Ludwik Adamowicz

2019

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DOI 10.1088/1361-6455/ab2510
Data confidence 70 medium
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Abstract

Abstract In this work we report very accurate calculations of the ten lowest 1 P ( L = 1) bound states of the beryllium atom performed with the finite-nuclear-mass (FNM) approach and with all-electron explicitly correlated Gaussian functions. The FNM non-relativistic variational energies of the states are augmented with the leading relativistic and quantum-electrodynamics (QED) corrections. The latter include the Araki–Sucher QED correction whose implementation for the L = 1 states is featured in this work. The calculated energies for interstate transition energies are compared with the experimental results.