Effect of the increase in molecular complexity on the statistical properties of vibrational spectra. Four coupled Morse oscillators

Fabio Pichierri, Naseem Rahman

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Energy level statistics are presented for the vibrational levels of polyatomic molecules utilizing a local mode Hamiltonian made of four coupled Morse oscillators. The nearest-neighbour level spacing distribution shows a progressive transition towards a Wigner distribution. The Δ3 statistics of Dyson-Mehta and correlation coefficients also lead to the same conclusion. The effect of the model-independent kinetic (Wilson) coupling is found to be overwhelmingly predominant over coordinate coupling.

Original languageEnglish
Pages (from-to)275-278
Number of pages4
JournalChemical Physics Letters
Volume223
Issue number4
DOIs
Publication statusPublished - 1994 Jun 24
Externally publishedYes

ASJC Scopus subject areas

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

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