In order to investigate electronic stopping power dependence of ion-track size in UO2, ion-tracks in UO2 irradiated with various ions with the specific energy in the order of 1 MeV/u have been observed by a transmission electron microscope. The ion-track size shows monotonic increase as a function of the electronic stopping power. The ion-track size obtained for UO2 is smaller than that obtained for CeO2, although these two compounds have same crystallographic structure and similar thermal properties. The ion-track sizes for irradiations with ions having relatively low energy of about 1 MeV/u are smaller than those expected from the thermal spike models based on melting temperature criterion. The possible interpretations for the unusually small ion-tracks observed for UO2 are discussed.
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - 2013|
- Irradiation effect
- Transmission electron microscopy
ASJC Scopus subject areas
- Nuclear and High Energy Physics