Accession Number : AD0705668

Title :   INFLUENCE OF APPLIED STRESS AND DEFECT ATOMS ON THE ATOMIC VIBRATIONS IN SOLIDS AND LIQUIDS.

Descriptive Note : Final scientific rept. 1 Oct 68-30 Sep 69,

Corporate Author : OESTERREICHISCHE STUDIENGESELLSCHAFT FUER ATOMENERGIE G M B H VIENNA DEPT OF PHYSICS

Personal Author(s) : Weinzierl,P.

Report Date : 04 FEB 1970

Pagination or Media Count : 34

Abstract : A sodium single crystal sample was tested, adopted to the scattering chamber and a series of systematic exploratory measurements has been done with the aim to find favourable conditions for the subsequent pressure-induced phonon frequency shift measurements. An improved control system for the triple-axis spectrometer driven by paper tape has been completed and put in operation. A calculation on the surface vibrations in crystal using an improved force constant model and some unusual methods was done resulting in a values of Debye-Waller factors and of dispersion relations for surface modes in small crystals. (Author)

Descriptors :   (*SODIUM, *NUCLEAR RADIATION SPECTROSCOPY), PHONONS, SCATTERING, CRYSTAL DEFECTS, AUSTRIA

Subject Categories : Crystallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE