Spectroscopy of Diatomic Molecules at Long Range

实验物理化学和原子，分子和光学物理程序支持威廉C。康涅狄格大学物理系的Stwalley在他对双原子分子的长距离光谱研究中的贡献。 在这项工作中，Stwalley教授将与菲利普L.古尔德是研究超冷原子碰撞的专家。 他们将使用全光学多重共振光谱研究超冷碱金属原子的高分辨率光缔合光谱。 重点将放在碱金属化合物的高激发态（例如，钾或铯二聚体），但Stwalley和Gould也将试图观察原子分子如Cs-H2的光缔合。 长程分子是其中原子被 尽管距离很大，但引力仍然足够强，足以维持“分子”性质。 这种分子具有很强的电流 感兴趣，部分原因是新的影响出现，这将延长我们的 分子势曲线的知识，部分原因是它们的 与激光冷却和俘获以及玻色-爱因斯坦理论的相关性 凝 将在这个新的研究中进行的研究 合作的努力将大大增加我们对化学的理解， 通过揭示吸引和“联系”的微妙力量来建立联系 原子之间的核间距很大。 成功完成 这些研究将提供非常详细的信息， 这些力量反过来对我们理解 原子碰撞和原子组装成更高的 从分子到团簇，再到凝聚的聚合物， 阶段。

The Experimental Physical Chemistry and the Atomic, Molecular and Optical Physics Programs support William C. Stwalley of the Physics Department at the University of Connecticut in his continuing spectroscopic studies of diatomic molecules at long range. In this effort, Prof. Stwalley will collaborate with Prof. Phillip L. Gould, an expert in collisions of ultracold atoms. They will investigate the high-resolution photoassociative spectroscopy of ultracold alkali atoms using all optical multiple resonance spectroscopies. Emphasis will be on highly excited states of alkali metal diatomics (e.g., potassium or cesium dimers), but Stwalley and Gould will also attempt to observe photoassociation of atom-molecules such as Cs-H2. Molecules at long range are molecules in which the atoms are separated by very large distances, yet attractive forces are still strong enough to maintain a `molecular` nature. Such molecules are of great current interest, partly because new effects show up which will extend our knowledge of molecular potential curves, partly because of their relevance to the work in laser cooling and trapping and Bose-Einstein condensation. The studies that will be carried out in this new collaborative effort will greatly increase our understanding of chemical bonding by revealing the subtle forces that act to attract and `congeal` atoms separated by large internuclear distances. Successful completion of these studies will furnish highly detailed information on interatomic forces which, in turn, are of fundamental importance to our understanding of atomic collisions and the assembly of atoms into higher states of aggregation ranging from molecules, to clusters, and on to condensed phases.