Large isotope effects in photodissociation of polyatomic molecules

Yehuda B. Band, Karl F. Freed

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


The example of the photodissociation of HCN is used to demonstrate the existence of huge isotope effects in general classes of the photodissociation of polyatomic molecules. The isotopic ratio of photodissociation rates is of the form exp[(μ11/221/2)K], where μ1 and μ2 are the reduced masses of the atomic fragments (different isotopes), and where K is dependent on molecule and fragment normal modes as well as upon the interfragment repulsive potential. Conditions for the maximization of K are discuss.

Original languageEnglish
Pages (from-to)4479-4484
Number of pages6
JournalJournal of Chemical Physics
Issue number10
StatePublished - 1 Jan 1975
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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