Nonadiabatic Effects in Alkali Atom-Rare Gas Interactions: Optical Collisions and Spectroscopy (Physics)

原子碰撞对态间的非绝热耦合 原子或分子在决定状态中起着重要作用 特定的横截面，适用于各种弹性和 非弹性碰撞过程 其中包括非辐射 电子跃迁，如淬火或精细结构 跃迁，相干转移和碰撞去极化， 以及旋转和振动能量转移。 非绝热 在光致碎裂过程中， 如光解离、光电离或碰撞 光的重新分配。 作用的实验研究 光学碰撞动力学的非绝热耦合 碱金属（钠和锂）和稀有气体原子之间的关系将是 贯彻 精细结构分支和生产 的塞曼多极将进行调查，沿着 最近观察到的非线性激光强度依赖的 精细结构分支 李贺与周恩来 NaHe分子Rydberg光谱，其应显示 通过核心的显著旋转非绝热性 旋转和振动也将被追求。

Nonadiabatic couplings among states of a colliding pair of atoms or molecules have an essential role in determining state- specific cross-sections for a wide range of elastic and inelastic collision processes. These include nonradiative electronic transitions such as quenching or fine-structure transitions, coherence transfer and collisional depolarization, and rotational and vibrational energy transfer. Nonadiabatic effects are also important in photofragmentation processes such as photodissociation, photoionization, or collisional redistribution of light. Experimental studies of effects of nonadiabatic couplings on the dynamics of optical collisions between alkali (sodium and lithium) and rare gas atoms will be carried out. Both fine-structure branching and the production of Zeeman multipoles will be investigated, along with the recently observed nonlinear laser intensity dependence of the fine-structure branching. An investigation of the LiHe and NaHe molecular Rydberg spectrum, which should exhibit significant rotational nonadiabaticity through the core rotation and vibration, will also be pursued.