Measurement of (00 v sub 3 ) levels in X sup 2. Pi. NCO by stimulated emission pumping spectroscopy

Journal Article · Fri May 15 04:00:00 EDT 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.462426· OSTI ID:7113699

Northrup, F J; Wu, M; Sears, T J ^[1]

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1. Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Laser induced fluorescence measurements of NCO formed in the reaction CN+O{sub 2}{r arrow}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 {ital {tilde A}}--{ital {tilde X}} system, the {ital v}{sub 1}, {ital v}{sub 2}, {ital v}{sub 3}=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{sup {minus}1} in energy. Stimulated emission pumping experiments were carried out on vibronic levels associated with the {nu}{sub 3} vibration with 1{le}{ital v}{sub 3}{le}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.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7113699
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 96:10; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON NITRIDES
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COLLISIONS
COMPLEXES
EMISSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUORESCENCE
JETS
LASERS
LUMINESCENCE
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITRIDES
NITROGEN COMPLEXES
NITROGEN COMPOUNDS
OPTICAL PUMPING
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
PUMPING
ROTATIONAL STATES
STIMULATED EMISSION
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
VIBRATIONAL STATES