Energy dependence of the trapping of uranium atoms by aluminium oxide surfaces

The energy dependence has been measured of the trapping probability for sputtered 235U atoms striking an oxidized aluminium collector surface at energies between 1 eV and 184 eV. At the lowest energies approximately 10% of the uranium atoms are not trapped, while above 10 eV essentially all of them stick. In addition, trapping probabilities are presented averaged over the sputtered energy distribution for uranium incident on gold and mica. (author)