Collisional (T-V) excitation of CO/sub 2/ molecules by hot H. atoms
Thesis/Dissertation
·
OSTI ID:5528587
193nm photofragmentation of HBr molecules in HBr/CO/sub 2/ mixtures produces energetic (2.5 eV) hydrogen atoms which vibrationally excite CO/sub 2/ molecules via an inelastic translation-vibration/rotation (T-V/R) energy transfer process. Prompt infrared emission in the 4.3..mu..m region has been wavelength resolved, and the spectral energy distribution associated with the excited CO/sub 2/ product was measured. The emission profile is strongly red shifted from the spectral region of the nu/sub 3/ (00/sup 0/1 - 00/sup 0/0) fundamental transition indicating that these energetic collisions preferentially produce combination and overtone levels with oscillator strength in the 4.3..mu..m region. Cold gas filter studies show that significant emission originates from CO/sub 2/ bend-stretch excitation compared to pure stretching excitation. The vibrational energy distribution of the collisionally excited CO/sub 2/ molecules has been measured via time-resolved transient absorption of a diode laser probe beam following 193nm photodissociation of H/sub 2/S molecules in the presence of CO/sub 2/. IR diode laser transient absorption measurements indicate a population increase of 1.29, 1.06, and 67.8 over the ambient population in the nu/sub 1/, nu/sub 2/, and nu/sub 3/ vibrational states of the CO/sub 2/ molecules respectively.
- OSTI ID:
- 5528587
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Journal Article
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Journal Article
·
Thu Apr 15 00:00:00 EDT 1993
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·
OSTI ID:6697653
Collisional excitation of CO sub 2 (01 sup 1 1) by hot hydrogen atoms: Alternating intensities in state-resolved vibrational, rotational, and translational energy transfer
Journal Article
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Sun Jul 01 00:00:00 EDT 1990
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·
OSTI ID:6718964
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400500* -- Photochemistry
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
HYDROBROMIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INELASTIC SCATTERING
INFORMATION
INORGANIC ACIDS
LASERS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
ROTATIONAL STATES
SCATTERING
SOLID STATE LASERS
STRUCTURAL CHEMICAL ANALYSIS
SULFIDES
SULFUR COMPOUNDS
VIBRATIONAL STATES
400201 -- Chemical & Physicochemical Properties
400500* -- Photochemistry
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
HYDROBROMIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INELASTIC SCATTERING
INFORMATION
INORGANIC ACIDS
LASERS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
ROTATIONAL STATES
SCATTERING
SOLID STATE LASERS
STRUCTURAL CHEMICAL ANALYSIS
SULFIDES
SULFUR COMPOUNDS
VIBRATIONAL STATES