  Unusually narrow fluorescence peaks are seen from Rubidium-85 atoms under the
action of two driving laser fields that are in a three dimensional molasses
configuration. One of the lasers is held at a fixed detuning from the "cooling"
transition, while the other is scanned across the "repumping" transitions. The
fluorescence peaks are split into symmetric pairs, with the seperation within a
pair increasing with the detuning of the cooling laser. For large detunings
additional small peaks are seen. A simple model is proposed to explain these
experimental observations.
