Table of Contents
Laser Chemistry
Volume 12, Issue 1-2, Pages 75-84

Dynamics of the B 3Π(0u+) and A 3Π(1u) States of Chlorine by Laser Induced Fluorescence

Facultad de Ciencias Químicas, Universidad de Castilla-La Mancha, Paseo de la Universidad, 4, Ciudad Real 13071, Spain

Copyright © 1992 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.


Chlorine B 3Π(0u+) state lifetimes have been measured by laser-induced fluorescence in several predissociated (υ = 14–19,21) and non-predissociated (υ = 5–12) levels. Trial and error Franck-Condon calculations have been performed to check the nature and position of the predissociating state. The results have been used to give a value of Re for the A 3Π(1u) state responsible for predissociation, Re = 2.48 ± 0.01 Å. The obtained data show that interference effects due to crossing between B and A states modify the lifetimes of the B state appreciably. The inadequacy of the low-lying vibrational levels region, i.e. υ < 8, to measure the radiative lifetime of the B state (τR(B)) is shown. Previous values for τR(B) can therefore be affected by considerable errors.