Investigation of plasma oscillations in glasslike dielectrics by means of total external reflection of X rays

Glasslike dielectrics are investigated by methods of plasmon dispersion and asymmetry of the number of localized electrons in the region in which total external reflection of X-rays is formed and excitation of plasmon oscillations takes place. The internal mechanical stress and the related polarization of the studied dielectrics are determined. It is discovered that a lithium fluoride crystal lacks an internal mechanical stress and that the observed polarization in this single crystal is caused by a large macroscopic dipole moment.