Accession Number : AD0628861

Title :   SOLID STATE RADIATION-INDUCED PHENOMENA.

Descriptive Note : Final rept., 1 Mar-Sep 65,

Corporate Author : NEW YORK UNIV N Y DEPT OF PHYSICS

Personal Author(s) : Kallmann,Hartmut

Report Date : JAN 1966

Pagination or Media Count : 78

Abstract : The relationship between fluorescence, fluorescence quenching, light stimulation, glow areas, and the photoinduced EPR signals in excited Cr, Cu activated ZnS phosphors was studied. Two types of trap levels exist: deep traps due to chromium and shallow traps located in the neighborhood of ionized Cu activators; their trap populations are determined. AC impedance measurements on photo-excited CdS single crystals mounted between insulating layers was carried out. The use of insulating layers eliminates electron and hole injection and allows one to study the motion of the electrons inside the crystals separately. The transfer of excitation energy in organic solvents was investigated as function of temperature. It is reduced with increasing temperature. This is, to a large part, due to the decrease of the lifetime of the excited solvent molecule. The charge injection from unexcited inorganic layers into various organic solvents under illumination, and the charge exchange between organic solvents and crystals was studied. (Author)

Descriptors :   (*OPTICAL PHENOMENA, CRYSTALS), (*CRYSTALS, SOLID STATE PHYSICS), ZINC COMPOUNDS, SULFIDES, CADMIUM COMPOUNDS, LUMINESCENCE, PHOTOCONDUCTIVITY, PHOSPHORESCENT MATERIALS, INFRARED RADIATION, ULTRAVIOLET RADIATION, SOLUTIONS(MIXTURES), ORGANIC SOLVENTS, EXCITATION, SINGLE CRYSTALS, ELECTRICAL IMPEDANCE

Subject Categories : Crystallography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE