Three-body recombination at large scattering lengths in an ultracold atomic gas.
We study three-body recombination in an optically trapped ultracold gas of cesium atoms with precise magnetic control of the s-wave scattering length a. At large positive values of a, we measure the dependence of the rate coefficient on a and confirm the theoretically predicted scaling proportional to a(4). Evidence of recombination heating indicates the formation of very weakly bound molecules in the last bound energy level.
Weber
Tino
T
Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
Herbig
Jens
J
Mark
Michael
M
Nägerl
Hanns-Christoph
HC
Grimm
Rudolf
R