https://doi.org/10.1140/epjp/s13360-025-06384-z
Regular Article
Ro-vibrational energies, molecular constants, and VQD evaluation of potential energy model for CO Molecules
1
Department of Physics, College of Science, Sultan Qaboos University, P.O. Box 36, Al-Khod, P. C. 123, Muscat, Sultanate of Oman
2
Department of Physics, Theoretical Physics Group, University of Port Harcourt, Choba, Nigeria
3
Department of Physics, University of South Africa, Florida 1710, Johannesburg, South Africa
4
Research Laboratory on Energy and Matter for Nuclear Sciences Development, LR16CNSTN02, National Center for Nuclear Sciences and Technologies, Sidi Thabet Technopark 2020, Ariana, Tunisia
Received:
1
March
2025
Accepted:
29
April
2025
Published online:
24
July
2025
In this study, we explore the modified Morse potential (MMP) as a model for the potential energy of carbon monoxide (CO) molecules. The accuracy of the MMP is assessed using the vibrational quantum defect (VQD) method, an innovative approach adapted from Rydberg state spectroscopy to analyze deviations in energy levels, which offers a novel framework for quantum system analysis. The vibrational energies of the MMP for CO are computed and compared with RKR experimental data. Additionally, key spectroscopic parameters, including Dunham’s coefficients, are determined for the ground electronic state of CO. The results show strong agreement with experimental data and previous studies.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
