Photodissociation dynamics of N{sub 2}O at 130 nm: The N{sub 2}(A {sup 3}{sigma}{sub u}{sup +},B {sup 3}{pi}{sub g})+O({sup 3}P{sub J=2,1,0}) channels

Journal Article · Sun May 01 04:00:00 EDT 2005 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1888578· OSTI ID:20722180

Witinski, Mark F; Ortiz-Suarez, Marivi; Davis, H Floyd ^[1]

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1. Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853 (United States)

Oxygen Rydberg time-of-flight spectroscopy was used to study the vacuum ultraviolet photodissociation dynamics of N{sub 2}O near 130 nm. The O({sup 3}P{sub J}) products were tagged by excitation to high-n Rydberg levels and subsequently field ionized at a detector. In agreement with previous work, we find that O({sup 3}P{sub J}) formation following excitation to the repulsive N{sub 2}O D({sup 1}{sigma}{sup +}) state produces the first two electronically excited states of the N{sub 2} counterfragment, N{sub 2}(A {sup 3}{sigma}{sub u}{sup +}) and N{sub 2}(B {sup 3}{pi}{sub g}). The O({sup 3}P{sub J}) translational energy distribution reveals that the overall branching ratio between N{sub 2}(A {sup 3}{sigma}{sub u}{sup +}) and N{sub 2}(B {sup 3}{pi}{sub g}) formation is approximately 1.0:1.0 for J=1 and 2, with slightly less N{sub 2}(B {sup 3}{pi}{sub g}) produced in coincidence with O({sup 3}P{sub 0}). The angular distributions were found to be independent of J and highly anisotropic, with {beta}=1.5{+-}0.2.

• OSTI ID: 20722180
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 17 Vol. 122; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANGULAR DISTRIBUTION
ANISOTROPY
BRANCHING RATIO
DISSOCIATION
ENERGY SPECTRA
EXCITATION
NITROUS OXIDE
OXYGEN
PHOTOLYSIS
RYDBERG STATES
SPECTROSCOPY
TIME-OF-FLIGHT METHOD
ULTRAVIOLET RADIATION