Dynamical suppression of radiative decay via atomic deflection by a   standing light wave
  We consider the radiative decay of atoms scattered by a resonant standing light wave. Scattering is shown to suppress the Rabi oscillations and to slow down the atomic radiative decay giving rise to a power law behavior of the time-dependent level populations rather than the exponential one. 
M.A.Efremov, M.V.Fedorov, V.P.Yakovlev, W.P.Schleich