Table of Contents
Laser Chemistry
Volume 6, Issue 1, Pages 15-35

Internal Energy Distribution in MgO(a3Π) Formed From Mg(3P) + O2 and N2O : A Case of Population Inversion

Laboratoire de Photophysique Moléculaire CNRS, Bâtiment 213, Université de Paris-Sud, Orsay Cedex 91405, France

Copyright © 1986 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 internal state distribution of MgO(a3Π) formed from Mg(3P) + O2 and N2O reactions was determined from a reanalysis of the laser induced fluorescence spectra of the d3Δ - a3Π system previously published by Dagdigian. The MgO(a3Π) state formed in the reaction with O2 has a quasi-Boltzmann distribution. In the N2O reaction the rotational excitation is much greater and the vibrational population distribution is inverted with a maximum at v = 2 - 3. The a3Π rovibrational population distributions are compared with those of the X1+ ground state. The dynamics of these reactions are discussed on the basis of earlier ab-initio calculations and experimental data.