Table of Contents
Laser Chemistry
Volume 3, Issue 1-6, Pages 97-106

Energy Partitioning in Molecular Photodissociation: Methyl Nitrite Photolysis

1Laboratoire de Photophysique Moléculaire, Bât. 213, Université de Paris-Sud, Orsay 91405, France
2Laboratoire d'Utilisation du Rayonnement Electromagnérique, Bât. 200, Université de Paris-Sud, Orsay 91405, France

Copyright © 1983 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.


The photodissociation of methyl nitrite CH3ONO in three different electronically excited states has been studied by determining the internal state distribution of one of the photofragments. The fluorescence of NO AΣ2+ produced for excitation of CH3ONO between 1200 and 1650 Å and of CH3O 2A1 produced at 1930 Å has been investigated. The vibrational distribution in both species can be explained by statistical considerations. The rotational excitation of NO AΣ2+ is of Boltzmann type. For CH3ONO excited in the first nπ* excited state at 3550 Å the NO X fragment has been probed by a two photon laser excited fluorescence technique. The nascent NO X υ″ = 0, 1, 2, 3 exhibit a population inversion and a high degree of rotational excitation.