Ospelkaus C, Ospelkaus S, Humbert L, Ernst P, Sengstock K, Bongs K
Institut für Laserphysik, Luruper Chaussee 149, 22761 Hamburg, Germany.
Phys Rev Lett. 2006 Sep 22;97(12):120402. doi: 10.1103/PhysRevLett.97.120402. Epub 2006 Sep 18.
We report on the creation of ultracold heteronuclear molecules assembled from fermionic 40K and bosonic 87Rb atoms in a 3D optical lattice. Molecules are produced at a heteronuclear Feshbach resonance on both the attractive and the repulsive sides of the resonance. We precisely determine the binding energy of the heteronuclear molecules from rf spectroscopy across the Feshbach resonance. We characterize the lifetime of the molecular sample as a function of magnetic field and measure lifetimes between 20 and 120 ms. The efficiency of molecule creation via rf association is measured and is found to decrease as expected for more deeply bound molecules.
我们报告了在三维光学晶格中由费米子 40K 和玻色子 87Rb 原子组装而成的超冷异核分子的制备情况。分子是在异核费什巴赫共振的吸引侧和排斥侧产生的。我们通过跨越费什巴赫共振的射频光谱精确测定了异核分子的结合能。我们将分子样品的寿命表征为磁场的函数，并测量出寿命在 20 到 120 毫秒之间。通过射频缔合产生分子的效率被测量，并且发现其如预期那样随着分子束缚更深而降低。
