Accession Number : AD0437935


Title :   SOLID-STATE MICROWAVE RESEARCH.


Descriptive Note : Interim scientific rept. no. 2, 1 Feb-1 Apr 64,


Corporate Author : MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB


Personal Author(s) : Hanson,D C ; King,J E ; Rowe,J E ; Yeh,C


Report Date : Apr 1964


Pagination or Media Count : 33


Abstract : Various electron paramagnetic resonance experiments are reviewed in an effort to determine those materials most appropriate for parametric phonon interactions. One of the most promising materials is CdS:V(3+) since the nuclear spin of 7/2 associated with the V-51 isotope splits each fine line into eight lines. This results in a linewidth for absorption of approximately 700 gauss. The use of X-cut longitudinal quartz transducers resonant in the 5-40 mc region has allowed the observation of echoes up to 577 mc at room temperature. Similar results have been obtained up to 400 mc at liquid nitrogen temperature. The theory of stimulated Bremsstrahlung radiation from solids is developed further with particular emphasis on ionized impurity scattering. Experimental observation of significant powers at microwave frequencies can possibly be explained as a result of Raman scattering by optical phonon vibrational modes. Acoustic gain and velocity characteristics have been calculated for longitudinal mode excitation as a function of the velocity parameter u sub o/v. (Author)


Descriptors :   *SOLID STATE PHYSICS , ELECTRONS , PHONONS , QUARTZ , TRANSDUCERS , X BAND , ELECTROMAGNETIC RADIATION , MECHANICAL WAVES , PROPAGATION , WAVE PROPAGATION , PLASMAS(PHYSICS) , SCATTERING


Distribution Statement : APPROVED FOR PUBLIC RELEASE