We introduce a general wave-packet isotope-separation scheme exploiting the optical Ramsey method. Optically excited molecular wave packets in different isotopes develop a well-defined phase difference after just a few vibrational periods. Phase-locked pairs of optical pulses are able to selectively pump one isotope back down to the ground state and enhance the excited-state population of the other isotope. The method is illustrated by simulating wave-packet isotope separation of a mixture of ⁷⁹Br₂, ⁸¹Br₂, and ⁷⁹Br⁸¹Br. We also exploit phase-locked pairs of optical pulses to reduce the time required for the spatial separation of wave packets.
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Verlet et al. (2002) studied this question.
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