Accession Number : AD0669817

Title :   DYNAMICS OF LIQUIDS.

Descriptive Note : Final scientific rept. 1 Nov 64-31 Oct 67,

Corporate Author : TECHNISCHE HOCHSCHULE VIENNA (AUSTRIA) INSTITUT FUER EXPERIMENTALPHYSIK (II)

Personal Author(s) : Weinzierl,Peter

Report Date : 15 DEC 1967

Pagination or Media Count : 92

Abstract : A study of liquid dynamics was undertaken by means of absorption or scattering of recoilless emitted gamma-rays. The 46.5 keV transition in 183W with 60.0000026 eV line width is chosen. A complete Mossbauer absorption setup including a 0.5 m/s constant acceleration velocity drive, time-mode registration and a Ge(Li)-detector system was constructed. It was operated with excellent stability for transmission experiments. As all efforts to use WF6 as liquid tramission sample failed due to its unexpectedly low Debye-temperature, measurements on various other tungsten (VI)-halides were carried out. But eutectic mixtures of alkali-tungstates seem to offer better chances for the transmission experiment. For the scattering experiment development on a motor drive and a high speed loudspeaker drive was carried out. Operation up to 3 m/s drive velocity can now be realized. Instead of a primary gamma-energy selection by a bent crystal spectrometer a very selective resonance detector system was chosen using a pill box-type proportional counter and a special electronic suppression device for high energy background. (Author)

Descriptors :   (*FLUID MECHANICS, *MOSSBAUER EFFECT), GAMMA EMISSION, RAYLEIGH SCATTERING, TUNGSTEN COMPOUNDS, HALIDES, ALKALI METAL COMPOUNDS, TUNGSTATES, SOLUTIONS(MIXTURES), WATER, GLYCEROLS, INSTRUMENTATION, NUCLEAR RADIATION SPECTROSCOPY, AUSTRIA

Subject Categories : Fluid Mechanics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE