Table of Contents
Laser Chemistry
Volume 2008 (2008), Article ID 839873, 10 pages
http://dx.doi.org/10.1155/2008/839873
Research Article

Laser-Induced Photon-Branched Chain Reaction in a Chemically-Active Gas-Dispersed Medium

1Department of Physics and Optical Engineering, Rose-Hulman Institute of Technology, CM 192, 5500 Wabash Avenue, Terre Haute, IN 47803, USA
2Office of the Chancellor and Center for Nanoscience, Departments of Chemistry & Biochemistry and Physics & Astronomy, University of Missouri–St. Louis, 401 Woods Hall, One University Boulevard, St. Louis, MO 63121, USA

Received 25 April 2008; Accepted 29 December 2008

Academic Editor: Stavros Pissadakis

Copyright © 2008 Renat R. Letfullin et al. 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.

Abstract

A promising avenue in the development of high-energy pulsed chemical HF/DF lasers and amplifiers is the utilization of a photon-branched chain reaction initiated in a two-phase active medium, that is, a medium containing a laser working gas and ultradispersed passivated metal particles. These particles are evaporated under the action of IR laser radiation which results in the appearance of free atoms, their diffusion into the gas, and the development of a photon-branching chain process, which involves photons as both reactants and products. The key obstacle here is the formation of a relatively large volume (in excess of 103cm3) of the stable active medium and filling this volume homogeneously for a short time with a submicron monodisperse metal aerosol, which has specified properties. In this paper, results are presented for an extensive study of laser initiation of a photon-branched chain reaction in a gas-dispersed H2F2 medium.