Abstract
We present lifetime measurements of the level and the manifold of rubidium. We use a time-correlated single-photon counting technique on a sample of atoms confined and cooled in a magneto-optic trap. The upper state of the repumping transition serves as the resonant intermediate level for two-photon excitation of the level. A probe laser provides the second step of the excitation, and we detect the decay of atomic fluorescence to the level at 741 nm. The decay process feeds the manifold that decays to the ground state emitting UV photons. We measure lifetimes of and for the level and manifold, respectively; the hyperfine splitting of the level is The agreement with theoretical calculations confirms the understanding of the wave functions involved and provides confidence on the possibility of extracting weak interaction constants from a parity nonconservation measurement.
© 2004 Optical Society of America
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