RUI: Photoionization and Photorecombination Processes in Atomic Theory

主要的主题是双电子原子与强激光场的相互作用，导致电子分离。一个重要的机制是再碰撞，其中一个电子从原子中移除，然后在激光场中振荡，与剩余的原子一次或多次再碰撞。发现双碰撞比单碰撞更有效地去除剩余电子。我们的计划是利用双电子原子模型对这些双电离机制进行解析和数值研究。此外，还计划研究光复合，即电子在强激光场的存在下与原子离子复合。本科生将在计算机编程和分析方面对项目做出贡献，但也要解释双电离过程的物理学。

The primary topic is the interaction of two-electron atoms with intense laser fields, which leads to detachment of the electrons. An important mechanism is recollision, in which one electron is removed from the atom and then oscillates in the laser field, recolliding with the residual atom one or more times. It is found that double collisions can be more effective than single collisions in removing the remaining electron. The plan is to use models of the two electron atom in analytic and numerical studies of these mechanisms of double ionization. It is also planned to study photorecombination, in which electrons recombine with atomic ions in the presence of the intense laser fields. Undergraduate students will contribute to the project in computer programming and analysis, but also in explaining the physics of the double-ionization process.