Study of Electron Correlation in Atoms by Impulsive Double Ionization

本项目主要通过测量电子对动量密度，对电子在原子中的成对相关运动进行实验研究。该实验基于电子撞击双电离，其中一个抛射电子同时将两个电子撞出目标原子；然后在三重符合测量中检测到所有三个电子。在三体力学的限制下，结果可以用来确定两个目标电子的相对运动。实验将集中于使用镁原子作为目标，新的设备将允许增加巧合数据率，这将有可能达到获得有意义的电子对动量密度所需的精度，以便与理论结果进行比较。

This project focuses on an experimental investigation of the pairwise correlated motion of electrons in atoms through measurement of electron-pair momentum densities. The experiment is based on electron-impact double ionization, in which a projectile electron is used to knock two electrons out of the target atom simultaneously; all three electrons are then detected in a triple coincidence measurement. Within the limits of three-body mechanics, the results can be used to determine the relative motion of the two target electrons. The experiments will concentrate on using the magnesium atom as a target, and a new apparatus will allow for an increase in the coincidence data rate that will make it possible to reach the precision necessary to obtain meaningful electron-pair-momentum densities for comparison with theoretical results.