Photoemission Studies of Ionic Crystal Surfaces (Materials Research)

本文用角反射技术研究了银卤化物 集成和角分辨光电发射连续使用 在10至500电子伏范围内的可变光子能量。 将进行三种类型的实验：（1）第一种是 光子能量角积分价带光电发射 对于银4d水平，通过库珀最小值变化。 将采用薄的多晶样品，并尝试 将被用来从p-衍生的价带中分离d， 光电发射截面已知变化。 的角 各向异性因子也将在这些随机测量 定向多晶样品。 (2)角分辨 光电发射将在单片晶体上进行， 为了绘制价带和观察计算的自旋轨道 分裂 (3)高分辨率的核心水平光电发射将是 为了观察表面/体积核心水平变化而进行 在充分表征的银表面上。 高分辨率 薄膜的吸附系数将被测量的范围内 50至1500电子伏的选择材料。 这些研究 由于目前对这一问题的兴趣， 可调谐固体激光器的发展。

The silver halides will be studied by the techniques of angle integrated and angle resolved photoemission using continuously variable photon energy in the range 10 to 500 electron volts. Three types of experiments will be carried out: (1) The first is angle integrated valence band photoemission with photon energy variable through the Cooper minimum for the silver 4d levels. Thin polycrystalline samples will be employed, and an attempt will be made to separate d from p-derived valence bands by the known variation of photoemission cross section. The angular anisotropy factor will also be measured on these randomly oriented polycrystalline samples. (2) Angle resolved photoemission will be carried out on single sheet crystals in order to map the valence bands and observe calculated spin orbit splittings. (3) High resolution core level photoemission will be carried out in order to observe surface/volume core level shifts on well characterized silver bromide surfaces. High resolution thin film adsorption coefficients will be measured in the range 50 to 1500 electron volts on selected materials. These studies take on a new significance because of the current interest in the development of tunable solid state lasers.