Photodissociation of Thallium Bromide and Cesium Bromide

Abstract

Photodissociation of TlBr and CsBr by the 1850-Å mercury resonance line could lead to laser transitions at 5350 Å and 2.93 μ in Tl and Cs, respectively. The transition probabilities of Cs are such that radiative decay will maintain a population inversion between the 7²P_³/2 and 7²S_½ levels. Calculations indicate that a gain of 4% per m is expected at a temperature of 890° for photodissociation into the 7²P_{³/2, ½} Cs levels. In Tl, however, the 6²P_³/2 level is metastable. A suitable quenching gas must be found before oscillation is possible at 5350 Å from photodissociation into the 7²S_½ level. Nitrogen and CO₂ have been tried thus far without success.

© 1965 Optical Society of America

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