Rotation vibration spectrum of potassium molecules via the improved generalized Pöschl-Teller oscillator

Ridha Horchani*, Haikel Jelassi*, Akpan N. Ikot, Uduakobong S. Okorie

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


In this work, we used the improved generalized Pöschl-Teller potential (IGPT) to calculate the rotational-vibrational (ro-vibrational, hereinafter) energies of potassium molecules in the excited electronic state (Formula presented.). In doing this, we first solved the Schrödinger equation for the (IGPT) by applying both the Pekeris-type and the Greene-Aldrich approximations to the centrifugal term. The obtained energy spectra are compared with that of the experimental Rydberg-Klein-Rees (RKR) data. We also showed that the IGPT potential is a good potential function in fitting experimental RKR data for the 39K2 ((Formula presented.)) molecule. Finally, we have proved that Pekeris-type approximation is better than Greene-Aldrich approximation in calculating the accurate ro-vibrational energies spectra for the (Formula presented.) potassium molecular dimers.

Original languageEnglish
Article numbere26558
JournalInternational Journal of Quantum Chemistry
Issue number7
Publication statusPublished - Apr 5 2021


  • improved generalized Pöschl-Teller oscillator
  • potassium molecules
  • rotation vibration spectrum

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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