Measurement of (00v3) levels in X 2Π NCO by stimulated emission pumping spectroscopy

Frederick J Northrup*, Ming Wu, Trevor J. Sears

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Laser induced fluorescence measurements of NCO formed in the reaction CN + O2→NCO + O in a free jet expansion are reported. The rotational temperature achieved in the experiments was typically 10-15 K and absorption from vibrationally excited levels was very much reduced in intensity. Two bands in the Ã-X̃ system, the υ1, υ2, υ3 = 200-000 and 120-000, of the radical were rotationally resolved for the first time, and wavelength resolved laser excited fluorescence measurements have been used to characterize many ground state vibronic energy levels below 6000 cm-1 in energy. Stimulated emission pumping experiments were carried out on vibronic levels associated with the v 3 vibration with 1≤v3≤3 in the electronic ground state. Harmonic and anharmonic constants were determined, together with the spin-orbit coupling parameters and rotational constants for these levels.

Original languageEnglish (US)
Pages (from-to)7218-7228
Number of pages11
JournalThe Journal of Chemical Physics
Issue number10
StatePublished - Jan 1 1992

ASJC Scopus subject areas

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

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