title: Single pulse vibrational Raman scattering by a broadband KrF excimer laser in a hydrogen-air flame.
abstract: Spontaneous vibrational Raman scattering (VRS) is produced by a broadband excimer laser at 248 nm (KrF) in a H(2)-air flame and VRS spectra are recorded for lean, stoichiometric, and rich flames. Except at very lean flame conditions, laser-induced fluorescence (LIF) processes interfere with VRS Stokes lines from H(2), H(2)O, and O(2). No interference is found for the N(2) Stokes and N(2) anti-Stokes lines. In a stoichiometric H(2)/air flame, single-pulse measurements of N(2) concentration and temperature (by the VRS Stokes to anti-Stokes ratio) have relative standard deviation of 7.7 and 10%, respectively. These single pulse measurement errors compare well with photon statistics calculations using measured Raman cross sections.
authors.forename: R W
authors.initials: RW
authors.lastname: Pitz
authors.forename: J A
authors.initials: JA
authors.lastname: Wehrmeyer
authors.forename: J M
authors.initials: JM
authors.lastname: Bowling
authors.forename: T S
authors.initials: TS
authors.lastname: Cheng