title: Jet cooled cavity ringdown spectroscopy of the Ã(2)E(″)←X˜(2)A2 (') transition of the NO3 radical.
abstract: The A˜(2)E(″)←X˜(2)A2 (') spectrum of NO3 radical from 7550 cm(-1) to 9750 cm(-1) has been recorded and analyzed. Our spectrum differs from previously recorded spectra of this transition due to jet-cooling, which narrows the rotational contours and eliminates spectral interference from hot bands. Assignments of numerous vibronic features can be made based on both band contour and position including the previously unassigned 30 (1) band and several associated combination bands. We have analyzed our spectrum first with an independent anharmonic oscillator model and then by a quadratic Jahn-Teller vibronic coupling model. The fit achieved with the quadratic Jahn-Teller model is excellent, but the potential energy surface obtained with the fitted parameters is in only qualitative agreement with one obtained from ab initio calculations.
authors.affiliation: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University, 120 W. 18th Avenue, Columbus, Ohio 43210, USA.
authors.forename: Terrance
authors.initials: T
authors.lastname: Codd
authors.affiliation: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University, 120 W. 18th Avenue, Columbus, Ohio 43210, USA.
authors.forename: Ming-Wei
authors.initials: MW
authors.lastname: Chen
authors.affiliation: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University, 120 W. 18th Avenue, Columbus, Ohio 43210, USA.
authors.forename: Mourad
authors.initials: M
authors.lastname: Roudjane
authors.affiliation: Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, USA.
authors.forename: John F
authors.initials: JF
authors.lastname: Stanton
authors.affiliation: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University, 120 W. 18th Avenue, Columbus, Ohio 43210, USA.
authors.forename: Terry A
authors.initials: TA
authors.lastname: Miller