title: Photodissociation channels for N2O near 130 nm studied by product imaging.
abstract: The photodissociation of N(2)O at wavelengths near 130 nm has been investigated by velocity-mapped product imaging. In all, five dissociation channels have been detected, leading to the following products: O((1)S)+N(2)(X (1)Sigma), N((2)D)+NO(X (2)Pi), N((2)P)+NO(X (2)Pi), O((3)P) + N(2)(A (3)Sigma(+) (u)), and O((3)P) + N(2)(B (3)Pi(g)). The most significant channel is to the products O((1)S) + N(2)(X(1)Sigma), with strong vibrational excitation in the N(2). The O((3)P) + N(2)(A,B):N((2)D,(2)P) + NO branching ratio is measured to be 1.4 +/- 0.5, while the N(2)(A) + O((3)P(J)):N(2)(B) + O((3)P(J)) branching ratio is determined to be 0.84+/-0.09. The spin-orbit distributions for the O((3)P(J)), N((2)P(J)), and N((2)D(J)) products were also determined. The angular distributions of the products are in qualitative agreement with excitation to the N(2)O(D (1)Sigma(+)) state, with participation as well by the (3)Pi(v) state.
authors.affiliation: Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, USA.
authors.forename: H M
authors.initials: HM
authors.lastname: Lambert
authors.forename: E W
authors.initials: EW
authors.lastname: Davis
authors.forename: O
authors.initials: O
authors.lastname: Tokel
authors.forename: A A
authors.initials: AA
authors.lastname: Dixit
authors.forename: P L
authors.initials: PL
authors.lastname: Houston
mesh_terms: D003198:Computer Simulation; D004307:Dose-Response Relationship, Radiation; D007700:Kinetics; D008027:Light; D008956:Models, Chemical; D008958:Models, Molecular; D009569:Nitric Oxide / Q000737:chemistry* / Q000528:radiation effects; D009584:Nitrogen / Q000737:chemistry* / Q000528:radiation effects; D010100:Oxygen / Q000737:chemistry* / Q000528:radiation effects; D010777:Photochemistry / Q000379:methods*; D011829:Radiation Dosage
chemical_list: D009569:Nitric Oxide; D009584:Nitrogen; D010100:Oxygen