Investigations of Mechanically Induced Excited States on Cleavage Planes of Ionic Crystals. I. Method and Apparatus for Charge and Electron Emission Measurements

In part I of this paper a complex apparatus is described which enables the investigation of mechanically induced excited states on cleavage planes of alkali halide crystals. The charge distribution of a 6 × 6 mm2 cleavage plane can be measured without contact and with a local resolution better than 100 μm. The charge density can be determined quantitatively. In the same apparatus the thermally stimulated electron emission (TSEE) of the crystal, and, using a light probe, the locally resolved optically stimulated electron emission (OSEE) can be investigated. In part II of this paper results of the measurements are given.