Photodissociation channels for N2O near 130 nm studied by product imaging

J Chem Phys. 2005 May 1;122(17):174304. doi: 10.1063/1.1888579.

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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Computer Simulation
  • Dose-Response Relationship, Radiation
  • Kinetics
  • Light
  • Models, Chemical*
  • Models, Molecular*
  • Nitric Oxide / chemistry*
  • Nitric Oxide / radiation effects
  • Nitrogen / chemistry*
  • Nitrogen / radiation effects
  • Oxygen / chemistry*
  • Oxygen / radiation effects
  • Photochemistry / methods*
  • Radiation Dosage

Substances

  • Nitric Oxide
  • Nitrogen
  • Oxygen