Low‐energy electron transport in alkali halides

Excess Electron Color Centers in the Alkali Halides

The F center is the prototype of the excess electron color centers. Although many of the properties of this center are well understood, some interesting questions still remain concerning the nature of its relaxed excited state. The influence of uniaxial stress upon the luminescences has yielded new evidence for the diffuse nature of this state. A contrast will be made of the influence of uniaxi...

F-CENTER ELECTRON QUANTIZATION IN ALKALI HALIDE CRYSTALS Background Alkali halides and alkaline earth halides are strongly ionic compounds

Alkali halides and alkaline earth halides are strongly ionic compounds that solidify as crystals. The name for the alkali elements (Li, Na, K, Rb and Cs) comes from the Arabic word alqili (ashes of the salt-wort plant that was once used as a source of sodium and potassium for making glass from sand). The name for the halogen elements (F, Cl, Br, I—and the rare radioactive element astatine) come...

Detailed Study of the Electron-phonon Interaction in Alkali Halides” Part Ii Transmission Secondary Emission from Alkali Halides

The phenomenon of secondary emission from alkali halides is studied in transmission. This allows the variation of one more parameter (thickness) than in conventional reflection studies. An empirical method based on published results of scattering by thin foils is used to determine the spatial dependence of the internal electron excitation function. The results of the Monte Carlo calculations pr...

A Technique for Preparing Electron Trasparent Substrates of Alkali Halides

A new technique of preparing alkali halides electron transparent substrates has been developed. The substrate crystals are formed inside the holes of a carbon support film, so that each crystal has two free faces for deposition and study. The mechanism of formation of transparent crystals and the important factors involved have been discussed.

Frenkel Defects in Alkali Halides