Peper Michael, Deiglmayr Johannes
Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
Department of Physics and Geoscience, University of Leipzig, 04109 Leipzig, Germany.
Phys Rev Lett. 2021 Jan 8;126(1):013001. doi: 10.1103/PhysRevLett.126.013001.
We present the formation of homonuclear Cs_{2}, K_{2}, and heteronuclear CsK long-range Rydberg molecules in a dual-species magneto-optical trap for ^{39}K and ^{133}Cs by one-photon UV photoassociation. The different ground-state-density dependence of homo- and heteronuclear photoassociation rates and the detection of stable molecular ions resulting from autoionization provide an unambiguous assignment. We perform bound-bound millimeter-wave spectroscopy of long-range Rydberg molecules to access molecular states not accessible by one-photon photoassociation. Calculations based on the most recent theoretical model and atomic parameters do not reproduce the full set of data from homo- and heteronuclear long-range Rydberg molecules consistently. This shows that photoassociation and millimeter-wave spectroscopy of heteronuclear long-range Rydberg molecules provide a benchmark for the development of theoretical models.
我们展示了通过单光子紫外光缔合在用于(^{39}K)和(^{133}Cs)的双物种磁光阱中形成同核(Cs_{2})、(K_{2})以及异核(CsK)长程里德堡分子。同核和异核光缔合速率对基态密度的不同依赖性以及对自电离产生的稳定分子离子的检测提供了明确的归属。我们对长程里德堡分子进行束缚 - 束缚毫米波光谱分析，以获取单光子光缔合无法达到的分子态。基于最新理论模型和原子参数的计算并不能始终如一地重现同核和异核长程里德堡分子的全套数据。这表明异核长程里德堡分子的光缔合和毫米波光谱为理论模型的发展提供了一个基准。
