Explicitly correlated Gaussian calculations of the 2Po Rydberg spectrum of the lithium atom
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Date
2012
Authors
Bubin, Sergiy
Adamowicz, Ludwik
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Volume Title
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Abstract
Accurate quantum-mechanical nonrelativistic variational calculations are performed for the nine lowest members of the 2Po Rydberg series (1s2np1, n = 2, . . . , 10) of the lithium atom. The effect of the finite nuclear mass is included in the calculations allowing for determining the isotopic shifts of the energy levels. The wave functions of the states are expanded in terms of all-electron explicitly correlated Gaussian functions. The exponential parameters of the Gaussians are variationally optimized with the aid of the analytical energy gradient determined with respect to those parameters. The calculated state energies are compared with the available experimental data
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Keywords
Research Subject Categories::NATURAL SCIENCES::Physics, lithium atom, accurate quantum-mechanical nonrelativistic variational calculations
Citation
Sergiy Bubin, Ludwik Adamowicz; 2012; Explicitly correlated Gaussian calculations of the 2Po Rydberg spectrum of the lithium atom; THE JOURNAL OF CHEMICAL PHYSICS