Vibrational transition probabilities in the B-X and C-X systems of the SiF radical

Cameron W. Watson, Kenneth G. McKendrick

Research output: Contribution to journalArticle

Abstract

Vibrational transition probabilities have been measured for the B 2Σ+ (υ′ = 0, 1, 2, 4, 5)-X2Π(υ″=0-10) and C 2Δ(υ′ = 0, 1)-X2Π(υ″ = 0-5) band systems of the SiF radical. Individual B 2Σ+ and C 2Δ state vibrational levels were selectively populated by laser excitation of ground state SiF X 2Π prepared in a discharge-flow system. The resultant fluorescence was then dispersed and recorded. Comparison of the observed band strengths with Franck-Condon factors calculated from Rydberg-Klein-Rees potentials allowed the form of the respective electronic transition dipole moment functions to be estimated. The B-X system was found to have an electronic transition probability which did not vary significantly with internuclear separation. In contrast, the observations for the C-X system could only be reproduced by assuming a rapidly decreasing function. These conclusions are consistent with the accepted dominant electronic configurations of the states involved.

Original languageEnglish
Pages (from-to)87-95
Number of pages9
JournalChemical Physics
Volume187
Issue number1-2
DOIs
Publication statusPublished - 15 Sep 1994

ASJC Scopus subject areas

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

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