Accession Number : ADA020132

Title :   Experimental Development of a Displacement Wave (Phonon) Spectrometer.

Descriptive Note : Final rept. 15 Sep 72-15 Sep 75,

Corporate Author : INDIANA UNIV BLOOMINGTON DEPT OF PHYSICS

Personal Author(s) : Bron,W. E.

Report Date : 15 OCT 1975

Pagination or Media Count : 13

Abstract : During the period of three years of this grant, two major experiments have been carried out and completed. These are: (1) An experiment evaluating a vibronic sideband spectrometer for a study of nearly monochromatic phonons obtained through phonon-fluorescence from superconducting lead films. The results have been presented and published. (2) An experiment evaluating the use of superconducting tunneling junctions as generators and detectors of nearly monochromatic phonons. This experiment has shown the entirely unexpected result that high frequency phonons, at least as high as 1.4 THz, escape from superconducting Sn and that Pb junctions can be used as a partial spectrometer to obtain some information on the spectral distribution of the escaping phonons.

Descriptors :   *Superconductors, *Spectrometers, *Phonons, Tunneling(Electronics), Fluorescence, Thin films, Lead(Metal), Tin, Metal films, Junctions

Subject Categories : Test Facilities, Equipment and Methods
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE