ArticleScientific reports2025
Accurate evaluation of molecular potential energy functions through vibrational quantum defect analysis.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
We propose the use of the vibrational quantum defect (VQD) to select the best energy function that could better model the vibrational energy levels of diatomic molecules.We report an analysis of accurate experimental RKR energy data obtained from spectroscopy for the following molecular potentials: [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text]. From these, we extract the vibrational quantum deviations (VQD) using various energy functions. Additionally, we demonstrate that a simple, clear and straightforward analysis of VQD graphs (VQD Versus vibrational energy) facilitates the establishment of the energy function that exhibits the smallest deviation. Moreover, we demonstrate that the VQD method is very sensitive for detecting inaccuracy of oscillator models, especially in the case of ground molecular potentials.
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