INFRARED REFLECTION STUDIES OF SINGLE CRYSTAL LITHIUM HYDRIDE AND ON ITS ISOTOPIC DERIVATIVE.
Abstract
The room temperature infrared reflection spectra of lithium hydride, lithium deuteride, lithium -6 hydride, and lithium-7 hydride have been measured A Kramers-Kronig analysis was then used to determine the frequency dependence of the lattice dielectric constants, and thereby to obtain the long wavelength transverse optical (TO) and longitudinal optical (LO) lattice vibration frequencies. Within experimental error, the observed TO and LO frequencies of 'isotopic compounds' are found to be inversely proportional to the square roots of the reduced masses of the ion pairs. The data were used to derive the Szigeti effective charges for each of the compounds. The observed effective charges are discussed in terms of the shell model representation of the vibrating ions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1965
- Accession Number
- AD0476656
Entities
People
- E. Burstein
- M. H. Brodsky
Organizations
- University of Pennsylvania