Abstract

The termination steps of the laser-initiated Cl 2 /HBr chemical chain reaction have been studied via time-resolved infrared chemiluminescence (IRCL) from the vibrationally excited HCl(υ) product molecules. Laser photolysis/IRCL experiments were conducted at 298±3 K in slowly flowing gas mixtures of Cl 2 , HBr, and NO diluted in Ar. The termolecular association of Br . with NO (M=Ar) competed with the second propagation step for the Br . chain carrier, thereby terminating the chain

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