1 - IAEA Nuclear Data Services

•5 • 2. Other Experiments.
P. Schweis.s, E.Albold
3—.2.1 Phonon Dispersion in Iron
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Phonon dispersion measurements in the (110)-plane of room temperature
iron have been completed. The interatomic force constants of a
fifth neighbor Born- von Karman model have been determined. Using
the sampling technique a frequency distribution has been calculated
from these data.
Lit.: P. Schweiss et. al., Helvetica Physica Acta kOt 378 (1967)
3. 2.2 Doppler Broadening, of the 6.68 eV Resonance in ^U
The doppler broadening of the 6.68 eV resonance in metallic . nJ
and uranium dioxyde has been measured as a function of temperature
between room temperature and 1000 C. The line broadening in UOp
is quantitatively explained using a realistic frequency distribution
of lattice vibrations in U0? and the scattering law formalism.
Lit.: E. Albold, Thesis, Karlsruhe (1968)