Non-adiabatic mass correction for excited states of molecular hydrogen: improvement for the outer-well HH\ 1g+ term values
Abstract
The mass-correction function is evaluated for selected excited states of the hydrogen molecule within a single-state non-adiabatic treatment. Its qualitative features are studied under the avoided crossing of the EF with the GK state and also for the outer well of the HH state. For the HH state, a negative mass correction is obtained for the vibrational motion near the outer minimum, which accounts for most of the deviation between experiment and earlier theoretical work.
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