Jochim S, Bartenstein M, Altmeyer A, Hendl G, Chin C, Hecker Denschlag J, Grimm R
Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.
Phys Rev Lett. 2003 Dec 12;91(24):240402. doi: 10.1103/PhysRevLett.91.240402. Epub 2003 Dec 8.
We report on the production of a pure sample of up to 3 x 10(5) optically trapped molecules from a Fermi gas of 6Li atoms. The dimers are formed by three-body recombination near a Feshbach resonance. For purification, a Stern-Gerlach selection technique is used that efficiently removes all trapped atoms from the atom-molecule mixture. The behavior of the purified molecular sample shows a striking dependence on the applied magnetic field. For very weakly bound molecules near the Feshbach resonance, the gas exhibits a remarkable stability with respect to collisional decay.
我们报告了从6Li原子的费米气体中制备出多达3×10⁵个光学捕获分子的纯样品。二聚体是在费什巴赫共振附近通过三体复合形成的。为了进行纯化，使用了一种斯特恩-盖拉赫选择技术，该技术能有效地从原子-分子混合物中去除所有捕获的原子。纯化后的分子样品的行为对所施加的磁场表现出显著的依赖性。对于费什巴赫共振附近非常弱束缚的分子，该气体在碰撞衰变方面表现出显著的稳定性。
