A new technique for measuring Doppler effect
Abstract
A technique for measuring the Doppler effect was developed; the method comprised the use of a piezoelectric transducer coupled to a target foil to induce motion in the target atoms. Preliminary measurements using a thin Cd foil together with a diffractometer indicated that the method was feasible. Subsequently, the total cross section of U-238 was measured by the time-of-flight method using the ORELA 20 meter station. Data were taken at target temperatures of 138 K and 293 K both with the target foil stationary and vibrating. An x-cut quartz crystal vibrating at 88 kHz was used and the energy range from 3.75 to 39.60 ev was covered. The results for the 6.67 ev resonance were obtained for both target temperatures; the expected broadening of the resonance was observed when the target was vibrated. An asymmetry observed in the broadened resonance was tentatively attributed to the phonon distribution.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1975
- Bibcode:
- 1975PhDT........68B
- Keywords:
-
- Doppler Effect;
- Piezoelectric Transducers;
- Cadmium;
- Quartz Crystals;
- Temperature;
- Uranium 238;
- Vibration;
- Instrumentation and Photography