On observing "new" states in small molecules

William M. Gelbart*, Joshua Jortner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In this paper we consider the general problem of a discrete state interacting with a continuum which is bounded below in energy. We investigate the optical properties of the new state which splits off below the threshold and determine its energy and oscillator strength in terms of the transition moments of the zero-order states and the matrix elements of the level shift operator. We study in particular the case of predissociation in diatomic molecules and provide numerical estimates and experimental criteria for the observation of this new effect. Finally, we discuss certain more general situations in which this phenomenon is expected to arise and suggest appropriate extensions of the present, semiempirical, treatment.

Original languageEnglish
Pages (from-to)2070-2077
Number of pages8
JournalThe Journal of Chemical Physics
Issue number5
StatePublished - 1971
Externally publishedYes


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