Table of Contents
Laser Chemistry
Volume 8, Issue 2-4, Pages 169-191
http://dx.doi.org/10.1155/LC.8.169

The Small Molecule Limit of Infrared Multiphoton Dissociation: Collisional Effects in D2CO

1Materials and Chemical Sciences Division of the Lawrence Berkeley Laboratory, Berkeley 94720, CA, USA
2Department of Chemistry of the University of California, Berkeley 94720, CA, USA
3McDonnell Douglas Research Laboratories, P. O. Box 516, St. Louis 63166, MO, USA

Received 22 August 1987; Accepted 20 September 1987

Copyright © 1988 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The infrared multiphoton excitation of D2CO was studied by monitoring infrared fluorescence from stretching modes of D2CO following excitation in the bending modes. The dependence of the infrared multiphoton dissociation yield on laser wavelength, on laser power, and on reactant and foreign gas pressures was also studied. Severe bottlenecks to excitation through the first few steps are found. Vibration-to-vibration transfer of a bending quantum from one excited D2CO molecule to another is a crucial step. Collision-induced changes of rotational quantum number must also play an important role.