Large rotational energy release in collision-induced SiF C2Δ-B2Σ+ valence-Rydberg transfer

Neil A. Jackson, Cameron W. Watson, Kenneth G. McKendrick*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Distinct rotational population distributions were prepared in SiF C2Δ, ν = 0 radicals by laserexcitation. Collisions with H2 or N2 transferred a fraction of the C2Δ molecules to the lower-lying B2Σ+ state. B-X fluorescence spectra revealed the nascent rotational populations in the predominant B2Σ+, ν′ = 0 level. An unusually large fraction of the available energy is released as SiF rotation, supplementing the initial SiF rotational angular momentum. There is greater SiF B2Σ+ product rotation for N2 than for H2. A simple impulsive model is capable of rationalising these observations, consistent with previous vibrationally resolved measurements and the valence-Rydberg character of the transition.

Original languageEnglish
Pages (from-to)564-570
Number of pages7
JournalChemical Physics Letters
Issue number5-6
Publication statusPublished - 22 Sept 1995

ASJC Scopus subject areas

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


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