论文标题
一种新型的高电流，高分辨率，低运动能源电子源，用于逆光发射光谱
A novel high-current, high-resolution, low-kinetic-energy electron source for inverse photoemission spectroscopy
论文作者
论文摘要
描述了用于逆光发射光谱（IP）的高电流电子源。该源包含一个热阴极电子发射系统，一个静电偏转器单调启发仪和目标可变动能的镜头系统（1.6-20 eV）。当缩放到能量分辨率时，电子电流的数量级高于在电子能量损失光谱范围内开发的电子源的数量级。令人惊讶的是，实验测量的能量分辨率被证明要比标准程序计算出的明显好，其中包括连续近似中的电子电子排斥。所达到的电流也明显高于预测。我们将这种“反向效应”归因于二进制电子电子碰撞在向前方向上选择的机理。
A high-current electron source for inverse photoemission spectroscopy (IPES) is described. The source comprises a thermal cathode electron emission system, an electrostatic deflector-monochromator, and a lens system for variable kinetic energy (1.6 - 20 eV) at the target. When scaled to the energy resolution, the electron current is an order of magnitude higher than that of previously described electron sources developed in the context of electron energy loss spectroscopy. Surprisingly, the experimentally measured energy resolution turned out to be significantly better than calculated by standard programs, which include the electron-electron repulsion in the continuum approximation. The achieved currents are also significantly higher than predicted. We attribute this "inverse Boersch-effect" to a mechanism of velocity selection in the forward direction by binary electron-electron collisions.
