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APS » Journals » Phys. Rev. A » Volume 64 » Issue 2
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Phys. Rev. A 64, 021402(R) (2001) [4 pages]

Sympathetic cooling of 85Rb and 87Rb

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Immanuel Bloch, Markus Greiner, Olaf Mandel, Theodor W. Hänsch*, and Tilman Esslinger
Sektion Physik, Ludwig-Maximilians-Universität, Schellingstrasse 4/III, D-80799 Munich, Germany
Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany

Received 22 December 2000; published 10 July 2001

We demonstrate sympathetic cooling between magnetically trapped 85Rb and 87Rb atoms. Up to 6×106 85Rb atoms are cooled via elastic collisions with a reservoir of 8×108 87Rb atoms. The temperature of the binary atomic ensemble is adjusted by using radio-frequency evaporation of 87Rb. Temperatures as low as T=100 nK have been realized in the binary ensemble. Through a cross-dimensional mixing approach we have been able to measure the interspecies 87Rb-85Rb scattering cross section σ=1.52(34)×10-15 m2.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.64.021402
DOI:
10.1103/PhysRevA.64.021402
PACS:
32.80.Pj, 03.65.Nk, 03.75.Fi, 05.30.Jp

*Also at Department of Physics, University of Florence, Florence, Italy.

 
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