$^4$He channelling studies of $U_4O_9$ - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Year : 2006

$^4$He channelling studies of $U_4O_9$

L. Nowicki
  • Function : Author
A. Stonert
  • Function : Author
A. Pietraszko
  • Function : Author
E. Wendler
  • Function : Author


UO2 and U4O9 single crystals were investigated by means of the 4He backscattering/channelling technique and the use of the 3032-keV elastic scattering resonance on 16O. Angular scans obtained for U4O9 were interpreted in the framework of a recently published U4O9 model. It was shown that the U4O9 channelling data can be explained by the aggregation of some O atoms in cuboctahedral clusters, and the displacement of other (U and O) atoms from the UO2-type sites. Basing on the combined use of the channelling technique and Monte Carlo simulations we suggest that the displacements of U atoms from their fluorite sites are larger than those determined by the neutron diffraction analysis.

Dates and versions

in2p3-00090037 , version 1 (27-08-2006)



F. Garrido, L. Nowicki, A. Stonert, A. Pietraszko, E. Wendler. $^4$He channelling studies of $U_4O_9$. Seventeenth International Conference on Ion Beam Analysis, Jun 2005, Seville, Spain. pp.497-500, ⟨10.1016/j.nimb.2006.03.039⟩. ⟨in2p3-00090037⟩
4 View
0 Download



Gmail Facebook X LinkedIn More