Cold atom-molecule collisions

该项目的目标是在非常低的散射能量下实验研究原子和分子之间的非反应性和反应性碰撞。该新方法包括将超冷锂（Li）原子的磁光和磁阱与现有的装置相结合，用于通过旋转喷嘴的超音速膨胀产生冷分子的慢束。锂原子与卤素氢化物分子（HF，HCI，HBr，HI）的碰撞将在碰撞能量下降到1毫电子伏，在该碰撞过程是量子力学性质的研究。由于反应粒子的相对简单的电子结构，基元反应散射过程Li+HF（LiF+H）特别令人感兴趣。它属于迄今为止可以完全量子力学处理的极少数反应。该项目开辟了在非常低的散射能量下研究各种基本化学反应的道路，在这种情况下，反应动力学受量子效应的影响，并有望出现新的现象。

The goal of this project is to experimentally investigate non-reactive and reactive collisions between atoms and molecules at very low scattering energies. The novel approach consists of combining a magneto-optic and magnetic trap for ultracold lithium (Li) atoms with an existing setup for producing slow beams of cold molecules by means of supersonic expansion out of a rotating nozzle. Collisions of Li atoms with halogen hydride molecules (HF, HCI, HBr, HI) will be studied at collision energies down to 1 meV, at which the collision process is of quantum mechanical nature. The elementary reactive scattering process Li+HF(LiF+H is of particular interest due to the relatively simple electronic structure of the reacting particles. It belongs to the very few reactions that to date can be treated fully quantum mechanically. This project opens the way to studying a variety of elementary chemical reactions at very low scattering energies, at which reaction dynamics is governed by quantum effects and new phenomena are expected.