Abstract
The development of a photodissociation chemical laser utilizing the 2P1/2–2P3/2 transition between components of the fine structure of the bromine atom (λ = 2.714 μ) is reported. The laser utilizes an i-C3F7I–IBr mixture. As a result of pulsed photoinitiation of this mixture, both photodissociative pumping IBr + hν → Br(2P1/2) + I, typical of an IBr molecular photodissociation laser, and chemical pumping RI + hν → R + I(2P1/2); I(2P1/2) + IBr → I2 + Br(2P1/2), similar to that found in a chemical laser utilizing an RI + Br2 mixture, are achieved simultaneously. The maximum output energy of a photodissociation chemical laser is 3.9 and 1.6 times higher than the values for photodissociation and chemical lasers, respectively. The degree of excitation of bromine atoms in the second reaction, determined by laser resonance spectroscopy, is e 5 = [Br(2P1/2)] / [Br (2P1/2)] + [Br(2P3/2)] = 0.5 ± 0.1.
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