Dunham expansion
id:
dunham-expansion-195-3977589
title:
Dunham expansion
text:
In quantum chemistry, the Dunham expansion is an expression for the rotational-vibrational energy levels of a diatomic molecule: where v and J are the vibrational and rotational quantum numbers, and Ω is the projection of J along the internuclear axis in the body-fixed frame.
The constant coefficients Y k , l are called Dunham parameters with Y 0 , 0 representing the electronic energy. The expression derives from a semiclassical treatment of a perturbational approach to deriving the energy level
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https://en.wikipedia.org/wiki/Dunham_expansion
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2021-08-22T20:01:01Z
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