A tunable narrow-frequency laser is used to produce an isotopically selected reaction product of bromine. Natural Br₂ (⁷⁹Br/⁸¹Br=1) is photopredissociated by selective excitation into the ³II_0⁺u state. Bromine atoms enriched in one isotope react with HI before scrambling occurs to produce 80-85% H⁸¹Br. The method should yield an efficient technique for isotope separation. Spectroscopic requirements and the optimum reaction conditions are discussed. The relative amount of nonselective product from excitation of the Br₂ continuum is determined.
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Leone et al. (1974) studied this question.
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