The frozen-core approximation for diatomic molecules: the lowest1Σ+states of H2
- 1 May 1972
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 5 (5), 927-933
- https://doi.org/10.1088/0022-3700/5/5/013
Abstract
Adiabatic potential energies for the two lowest 1 Sigma + states of the hydrogen molecule have been calculated in the frozen core approximation over a range of internuclear separations from 0.2 to 4 au. The results are comparable with the SCF calculation of Coulson (1938) for the X1 Sigma g+ ground state, and with the multi-configuration calculation of Browne (1969) for the B1 Sigma u+ excited state. Transition moments for the X1 Sigma g+-B1 Sigma u+ electronic transition have also been computed.Keywords
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