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Condensed Matter Seminars
| Special AMO/Chemical Physics Seminar
Thursday, March 30, 2000
Physics Building, Room 204
Note special time.
Note special room.
[Host: Robert Jones]
University of Connecticut
"Characterization and Control of Ultracold Collisions"
We have developed several new techniques for observing and altering
ultracold collisions in laser-cooled Rb. We have found that the
trapping laser in a typical magneto-optical trap (MOT) can increase
inelastic collision rates by more than an order of magnitude. We have
also observed ultracold collision dynamics in the temporal domain for the
first time, by using a series of laser pulses that interact with a
colliding pair of atoms at different internuclear distances. Together
with other experiments that use repulsive or attractive molecular
potentials to reduce or increase inelastic or elastic collision rates, we
are developing the tools to understand and utilize the extremely
long-range molecular potentials involved (R > 300 bohr radii), which
cannot be studied using conventional spectroscopy.
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