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A: Atomphysik

A 9: Cooling and Trapping II (joint session A and Q)

A 9.4: Vortrag

Dienstag, 3. April 2001, 18:15–18:30, H104

Photoassociation in a sodium BEC — •J. Denschlag^1,2, J. Simsarian¹, D. Cho¹, C. McKenzie¹, K. Helmerson¹, S. Rolston¹, W.D. Phillips¹, F. Fatemi¹, K. Jones¹, and P. Lett¹ — ¹NIST, Gaithersburg, MD 20899, USA — ²Institut für Experimentalphysik, Universität Innsbruck

report on photo association experiments with sodium atoms from a Bose-Einstein condensate. A photoassociation laser beam of appropriate frequency hits the Bose-Einstein condensate and forms excited molecular states with a lifetime of about 10 ns. The production of molecules is detected as a loss in atom number of the BEC. We present preliminary data where we studied the width of the molecular transition, and the rate at which molecules are formed. We observe a laser power dependent red shift of the molecular transition frequency.