Investigation of the Fundamentals for Collisionally Excited VUV and XUV Lasers

迄今为止，仅在真空紫外（VUV）或软x射线区的极短波长激光跃迁已被证实。研究的主要目的是建立实验可控的标准，以确定XUV和VUV激光器的可行性。研究了具有潜在高输出功率的离子碱卤化物准分子中的VUV跃迁和双激发碱原子中的XUV跃迁，有望产生100nm以下的相干辐射。对于这两个系统，我们正在研究由激发的亚稳态稀有气体原子的碰撞能量转移来泵送上层激光能级。第二个目标是研究从激发亚稳态稀有气体原子到内壳激发碱原子和离子碱卤化物分子的碰撞能量传递过程。此外，还研究了高激发碱原子和碱卤化物分子的衰变。

To date only a few laser transitions in very short wave length of vacuum ultraviolet (VUV) or soft X-ray region have been demonstrated. The main thrust of the research is to establish experimentally controllable criteria to ascertain the feasibility of XUV and VUV lasers. VUV transitions in the ionic alkali halide excimers, with potential high output power, and XUV transitions in doubly excited alkali atoms, promising the generation of coherent radiation below 100 nm are being studied. For both systems pumping of the upper laser levels by collisional energy transfer from excited metastable rare gas atoms is being investigated. A second objective is the investigation of collisional energy transfer processes from excited metastable rare gas atoms to inner shell excited alkali atoms and ionic alkali halide molecules. Furthermore, the decay of highly excited alkali atoms and alkali halide molecules is being studied.