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- W2016204045 abstract "In this work we report variational calculations of the two lowest vibrational states of the HD molecule within the framework that does not assume the Born-Oppenheimer (BO) approximation. The nonrelativistic energies of the states were corrected for the relativistic effects of the order of ${ensuremath{alpha}}^{2}$ (where $ensuremath{alpha}=frac{1}{c}$), calculated as expectation values of the operators representing these effects with the nonrelativistic non-BO wave functions. The non-BO wave functions were expanded in terms of the one-center explicitly correlated Gaussian functions multiplied by even powers of the internuclear distance. The $v=0ensuremath{rightarrow}1$ transition energy obtained in the calculations is compared with the previous calculations, as well as with the transition frequency obtained from the experimental spectra. The comparison shows the need to include corrections higher than second order in $ensuremath{alpha}$ to further improve the agreement between the theory and the experiment." @default.
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- W2016204045 date "2009-03-16" @default.
- W2016204045 modified "2023-09-23" @default.
- W2016204045 title "Non-Born-Oppenheimer calculations of the lowest vibrational energy of HD including relativistic corrections" @default.
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- W2016204045 doi "https://doi.org/10.1103/physreva.79.032507" @default.
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