Vibrational transition probabilities in the B-X and B′-X systems of the SiCl radical

Scott Singleton, Kenneth G. McKendrick*, Richard A. Copeland, Jay B. Jeffries

*Corresponding author for this work

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8 Citations (Scopus)


Vibrational transition probabilities have been measured for the B2Σ+(ν′=0-3)-X 2Π(ν″=0-10) and B′2Δ(ν′=0,1)-X2Π(ν″=0-2) systems of SiCl. Individual vibronic levels of the excited states were prepared by laser excitation of ground-state SiCl formed in a discharge-flow system, and the resultant emission was dispersed and recorded. Independent measurements made in two laboratories were in very satisfactory agreement. The extensive results for the B-X system were compared with Franck-Condon factors derived from Rydberg-Klein-Rees potentials, allowing the form of the electronic transition dipole moment function to be assessed. It was found that the electronic transition probability for the B-X system is relatively slowly varying with internuclear distance, consistent with previous conclusions on the electronic configurations of the states involved The more limited data on the strongly diagonal B′-X system were not readily reproduced from the accepted form of the potentials and the anticipated electronic transition dipole moment.

Original languageEnglish
Pages (from-to)9703-9709
Number of pages7
JournalJournal of Physical Chemistry
Issue number24
Publication statusPublished - 1 Nov 1992

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry


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