Theoretical Investigation of the Electronic Structure and Spectra of Mg(2+)He and Mg(+)He

The Journal of Physical Chemistry. a
M BejaouiRaja El Oualhazi

Abstract

The ground and many excited states of the Mg(+)He van der Waals molecular system have been explored using a one-electron pseudopotential approach. In this approach, effective potentials are used to consider the Mg(2+) core and the electron-He effects. Furthermore, a core-core interaction is included. This has reduced the number of active electrons of the Mg(+)He, to be considered in the calculation, to a single valence electron. This has permitted to use extended Gaussian basis sets for Mg and He. Therefore, the potentianl energy and dipole moments calculations are carried out at the Hartree-Fock level of theory, and the spin-orbit effect is included using a semiclassical approach. The core-core interaction for the Mg(2+)He ground state is included using accurate CCSD(T) calculations. The spectroscopic constants of the Mg(+)He electronic states are extracted and compared with the existing theoretical works, where very good agreement is observed. Moreover, the transition dipole function has been determined for a large and dense grid of internuclear distances including the spin-orbit effect.

References

Sep 13, 2006·The Journal of Chemical Physics·M Ben El Hadj RhoumaF Spiegelman
Jun 15, 2010·The Journal of Physical Chemistry. a·J Dhiflaoui, H Berriche
Jun 29, 2010·The Journal of Physical Chemistry. a·Adrian M GardnerW H Breckenridge
Sep 25, 2012·The Journal of Physical Chemistry. a·J DhiflaouiM C Heaven
Dec 31, 2015·The Journal of Physical Chemistry. a·Raja El Oualhazi, Hamid Berriche

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