Mechanisms for the Exchange of Energy between a Rydberg Electron and Its Ion-Core: Free Induction Decay Detected Pure Electronic Spectroscopy

在这个奖项，由化学系的化学结构，动力学和机制（CSDM-A）计划资助，教授罗伯特W。马萨诸塞州理工学院的菲尔德和他的研究生及本科生同事正在研究里德伯分子中电子和原子核相互作用的方式。菲尔德教授和他的团队工作的最终目标是更好地理解分子的物理学，其中最外层的电子几乎不与离子核心结合。 利用缓冲气体冷却的分子束源，结合STIRAP（受激拉曼绝热通道）和ASTRO（绝热聚焦斯塔克混合里德伯轨道）激发，在低能量下制备了一系列不穿透原子核的里德伯分子（BaF、CaF、NO和NO2）. 里德伯内跃迁将使用啁啾脉冲毫米波光谱进行探测。 实验结果将与最先进的理论方法进行比较。

In this award, funded by the Chemical Structure, Dynamics and Mechanisms (CSDM-A) Program of the Division of Chemistry, Professor Robert W. Field of the Massachusetts Institute of Technology and his graduate student and undergraduate student colleagues are investigating the ways in which electrons and nuclei interact in Rydberg molecules. The ultimate goal of the work by Professor Field and his group is to develop a better understanding of the physics of molecules in which the outermost electron is barely bound to the ion-core. The team explores how energy is transferred between the weakly bound electron and the nuclei in the ion core of these interesting quantum-mechanical systems.A series of core-nonpenetrating Rydberg molecules (BaF, CaF, NO and NO2) will be produced with low energy using a buffer gas cooled molecular beam source coupled with STIRAP (Stimulated Raman Adiabatic Passage) and/or ASTRO (Adiabatically Focused Stark-mixed Rydberg Orbitals) excitation. Intra-Rydberg transitions will be probed using Chirped Pulse mm wave Spectroscopy. Experimental results will be compared to state-of-the-art theoretical methods.