Accession Number : AD0720874

Title :   The Study of the Reflectivity of Inorganic Materials Important for Remote Sensing Applications.

Descriptive Note : Final rept. 15 Sep 68-15 Sep 70,

Corporate Author : NORTHEASTERN UNIV BOSTON MASS SOLID STATE SPECTROSCOPY LAB

Personal Author(s) : Perry,Clive H. ; Lowndes,Robert P.

Report Date : NOV 1970

Pagination or Media Count : 128

Abstract : The influence of phase angle, compactness of material and particle size on the total reflectivity in the frequency range 10-10,000/cm on a variety of inorganic materials is presented. The determination of the k about 0 longitudinal optic frequencies and lifetimes from the dielectric and inverse dielectric response functions of simple cubic solids is discussed. The results of the temperature dependence over the range 5-400K of the k about LO frequencies and lifetimes of 18 alkali and thallium halides are given. In addition, the pressure dependence up to 5 kilobars at 290K of the LO frequencies of RbI, CsBr and CsI is reported. Far infrared transmittance and reflection spectroscopic measurements at near normal incidence and Raman spectroscopic measurements are reported for polycrystalline thallous iodide in the temperature range 5-550K. The results of reflectivity measurements as a function of phase angle for fused quartz and calcite single crystals are presented together with the reflectivities as a function of particle size, packing fraction and phase angle for powdered samples of quartz and calcite. A measurement and a discussion of the far infrared Stark and Zeeman splittings of Er(3+) in the rare earth fluorides is given. The occurrence of silicon monoxide bands in some low temperature stars is also discussed. (Author)

Descriptors :   (*INORGANIC COMPOUNDS, *RAMAN SPECTROSCOPY), REFLECTIVITY, DIELECTRIC PROPERTIES, HALIDES, ALKALI METAL COMPOUNDS, THALLIUM COMPOUNDS, FILMS, PHONONS, RARE EARTH COMPOUNDS, CRYSTAL STRUCTURE, QUARTZ, CALCITE, MINERALS, STARK EFFECT, ZEEMAN EFFECT, ERBIUM, SILICON COMPOUNDS

Subject Categories : Infrared Detection and Detectors
      Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE