Theoretical Modeling of Sr( q+ ) He ( q = 0, 1, 2) van der Waals Systems Including Spin-Orbit Coupling.
| Autor: | Bejaoui M; Faculty of Science of Monastir, Laboratory of Interfaces and Advanced Materials LR11ES55, Physics Department, University of Monastir, 5019 Monastir, Tunisia., Zrafi W; Faculty of Science of Monastir, Laboratory of Interfaces and Advanced Materials LR11ES55, Physics Department, University of Monastir, 5019 Monastir, Tunisia., Dhiflaoui J; Faculty of Science of Monastir, Laboratory of Interfaces and Advanced Materials LR11ES55, Physics Department, University of Monastir, 5019 Monastir, Tunisia., Berriche H; Faculty of Science of Monastir, Laboratory of Interfaces and Advanced Materials LR11ES55, Physics Department, University of Monastir, 5019 Monastir, Tunisia.; Department of Mathematics and Physics School of Arts and Sciences, American University of Ras Al Khaimah, Ras Al Khaimah P.O. Box 10021, United Arab Emirates. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | ACS omega [ACS Omega] 2024 Jul 15; Vol. 9 (30), pp. 32604-32616. Date of Electronic Publication: 2024 Jul 15 (Print Publication: 2024). |
| DOI: | 10.1021/acsomega.4c01433 |
| Abstrakt: | Using an ab initio methodology that incorporates pseudopotential technique in conjunction with pair potential approaches, core polarization potentials (CPP), large basis sets of Gaussian type, and full configuration interaction calculations, we investigate interaction of neutral and charged Sr q+ ( q = 0,1,2) with helium atom. In this context, the core-core interaction of Sr 2+ -He is included using an accurately performed potential for the ground state at CCSD(T) level of calculation. Also, the potential energy curves and permanent and transition dipole moments of the ground state and numerous excited states have been performed respectively for Sr + He and SrHe systems. Subsequently, the spin-orbit effect is considered by utilizing a semiempirical method for states dissociating into Sr + (5p) + He, Sr + (6p) + He, Sr + (4d) + He, Sr + (5d) + He, Sr(5s5p) + He, and Sr(5s4d) + He. The spectroscopic constants of the Sr q+ ( q = 0, 1, 2) He states, with and without spin-orbit interaction, are derived and assessed in comparison to the existing theoretical and experimental studies. Such comparison has revealed good agreement, especially, for the Sr + He ionic system. Additionally, the spin-orbit effect is considered for the X 2 Σ + → 2 2 Π Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|