Analysis of long range dispersion and exchange interactions between two K atoms

Warren T. Zemke, Chin Chun Tsai, William C. Stwalley

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1 Citation (Scopus)


This paper critically surveys the best available spectroscopic data for the two lowest electronic states (X 1Σg+ and a 3Σu+) of K2. Since both states are known up to dissociation, they can be used to determine Coulomb and exchange contributions to the intermediate and long range interaction potentials. The multipolar expansion representation of the Coulomb (dispersion) energy at long range (- ΣnCnR-n) and the exponential representation of the exchange energy (Ae-αR) as well as a variety of theoretical calculations are compared with these empirical results. Finally, dissociation energy values are discussed and improved dissociation energies for the X 1Σg+ (De = 4449.1±1.0 cm-1) and the a 3Σu+ state (De = 252.9±1.1 cm-1) proposed.

Original languageEnglish
Pages (from-to)10382-10387
Number of pages6
JournalThe Journal of Chemical Physics
Issue number12
Publication statusPublished - 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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