Photodissociation of NO2 by Pulsed Laser Light at 6943A

  • John Gerstmayr
  • Paul Harteck
  • Robert Reeves
Conference paper


Nitrogen dioxide was photodissociated using a pulsed ruby laser at 6943A. The energy of a single photon at this wavelength was equivalent to only 57% of the dissociation energy. The mechanism proposed to account for the results was the consecutive absorption of two photons, the first resulting in a short-lived excited state. The second photon is then absorbed by the excited species resulting in dissociation.


Nitrogen Dioxide Production Curve Rensselaer Polytechnic Institute N204 Molecule Excited Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    J. A. Emerson, Ph.D. Dissertation, Rensselaer Polytechnic Institute, Troy, New York, (1969).Google Scholar
  2. 2.
    W. H. Smith, J. Chem. Phys. 51, 3410 (1969).ADSCrossRefGoogle Scholar
  3. 3.
    J. G. Calvert and J. M. Pitts, Jr., Photochemistry, John Wiley and Sons, Inc., New York (1966), pp. 217, 219.Google Scholar
  4. 4.
    P. A. Leighton, Photochemistry of Air Pollution, Academic Press, New York (1961), P. 47.Google Scholar
  5. 5.
    Y. H. Pao and P. M. Rentzepis, Appl. Phys. Letters 6, 93 (1965).ADSCrossRefGoogle Scholar
  6. 6.
    G. Porter, Nature 215, 502 (1967).ADSCrossRefGoogle Scholar
  7. 7.
    S. Speiser and S. Kimel, J. Chem. Phys. 51, 5614 (1969).ADSCrossRefGoogle Scholar
  8. 8.
    G. Porter and J. I. Steinfeld, J. Chem. Phys. 45, 3456 (1966).ADSCrossRefGoogle Scholar
  9. 9.
    L. Harris and K. L. Churney, J. Chem. Phys. 47, 1703 (1967).ADSCrossRefGoogle Scholar
  10. 10.
    J. K. Dixon, J. Chem. Phys. 8, 157 (1940).ADSCrossRefGoogle Scholar
  11. 11.
    D. Neuberger and A.B.F. Duncan, J. Chem. Phys. 22, 1693 (1954).ADSCrossRefGoogle Scholar
  12. 12.
    Applying the approximation that, for small values of y, e−y = 1 −y to Beer’s Law results in the follow-expression: \(\Delta \textup{I}=\textup{NO}_{2}^{*}=\left [ \frac{\textup{I}_{o}\alpha_{1}\textup{X}}{\left ( \frac{\textup{part}.}{\textup{cc}.\textup{mm}}\right).\textup{V}_{\textup{R}}}\right](\textup{NO}_{2})\) where IO is the average photon flux, a is the coefficient for the first absorption, X is the path length of the cell, VR is the volume of gas exposed to the laser light (VR = 15cc), and \(\frac{(\textup{part})}{\textup{}}\) is a conversion factor from pressure to particles. The term in brackets is equal to γ1.Google Scholar
  13. 13.
    G. H. Myers, D. M. Silver and F. Kaufman, J. Chem. Phys. 44, 718 (1966).ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1972

Authors and Affiliations

  • John Gerstmayr
    • 1
  • Paul Harteck
    • 1
  • Robert Reeves
    • 1
  1. 1.Chemistry DepartmentRensselaer Polytechnic InstituteTroyUSA

Personalised recommendations