Relativistic treatment of alkaline earth dimers in the presence of non-central molecular potential in N-dimensions

DURMUŞ A., Ozfidan A.

CHEMICAL PHYSICS, cilt.543, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 543
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.chemphys.2020.111078
  • Dergi Adı: CHEMICAL PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
  • Anahtar Kelimeler: Alkaline earth dimers, Vibrational transition frequency, Relativistic theory, Non-central Morse potential, Hyperspherical coordinates, QUANTUM-MECHANICAL OSCILLATOR, ORBITAL ANGULAR MOMENTUM, KLEIN-GORDON EQUATION, CONSTANTS, SYSTEM, DIRAC, MGCA
  • Erciyes Üniversitesi Adresli: Evet

Özet

Within the framework of relativistic theory, N-dimensional non-central Morse potential as anharmonic model is considered thoroughly to describe the internuclear motion of alkaline earth dimers in the different electronic states. We illustrate the surface plots of alkaline earth dimers to examine the effect of angular potential, due to existence of molecular systems in which spherical symmetry disappears. Also, the contribution of angle dependent interaction to the relativistic energy spectra has been investigated in N-dimensions. We determine the relativistic vibrational transition frequencies in the lower vibrational states for the X-1 Sigma(+)(g) ground state of Mg-24(2), Ca-40(2), (MgCa)-Mg-24-Ca-40 and A(1)Sigma(+)(u) excited state of Sr-88(2) alkaline earth diatomic molecules. The theoretical results have been compared with Rydberg-Klein-Rees (RKR) and the inverted perturbation approach (IPA) experimental data. We also discussed the validity of Pekeris approximation around the equilibrium distance as well as the repulsive and attractive regions for alkaline earth dimers.