Table of Contents
Laser Chemistry
Volume 14, Issue 4, Pages 201-206

Laser-Induced Negative Ionization: The SF6 + Ba Surface Reaction

1Unidad de Láseres y Haces Moleculares, Instituto de Investigación Pluridisci, Plinar C/Juan XXIII-1°, Madrid 28040, Spain
2Facultad de Ciencias Químicas, Departamento de Química Física, Universidad Complutense de Madrid, Madrid 28040, Spain

Received 29 January 1993

Copyright © 1994 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.


This paper reports on the results about the SF6 + Ba (surface) reactions as a function of the vibrational excitation of the polyatomic molecule. A thermal, vibrationally excited by a tunable CO2 laser, SF6 beam is collided with a Ba surface target under high vacuum conditions. The total negative ion yield is measured as a function of the laser wavelength. Preliminary results show a strong vibrational enhancement of the beam-surface reactions indicating important laser-assisted negative ionization effects. The results are discussed in the light of several possible reaction mechanisms.