A gas-dispersed medium (aluminum particles in argon) was obtained for the f
irst time with the parameters necessary for the development of pulsed chemi
cal lasers based on photon-branched chain reactions: particle size, 0.1-0.1
5 mum; particle density, > 10(8) cm(-3); argon pressure, 0.3-1.5 atm; mediu
m lifetime, > 10 min. (C) 2001 MAIK "Nauka/Interperiodica".