Table of Contents
Laser Chemistry
Volume 8 (1988), Issue 2-4, Pages 235-242

Isotopically Selective Infrared Multiple-Photon Dissociation of MoF6 by a H2-Raman Laser

The Institute of Physical and Chemical Research, Saitama, Wako-shi 351-01, Japan

Received 6 August 1987; Accepted 10 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.


Infrared multiple-photon dissociation (IRMPD) of MoF6 has been investigated with a parallel beam of a para-H2 Raman laser newly developed by our group. MoF6 gas (2 Torr, natural abundance) was put into in a static cell cooled to −58℃ and was irradiated with the laser line at 728 cm−1. The critical fluence of 0.11 Jcm−2 for complete dissociation was determined by analysis with a Gaussian beam model. Irradiation at the lower frequency side (728 cm−1) of the MoF6 ν3 band enriched the lighter isotopes in the residue. A maximum value for selectivity of 1.1 was obtained.