Evidence for the formation of two types of oxygen interstitials in neutron-irradiated α-Al2O3 single crystals.

Authors are indebted to R. Vila for stimulating discussions. Tis work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under Grant agreement No 633053. The views and opinions expressed herein do not necessarily refect those of the European Commission. In addition, the research leading to these results has received funding from the Latvian grant LZP-2018/1-0147 (EV). Institute of Solid State Physics, University of Latvia as the Center of Excellence is supported through the Framework Program for European universities Union Horizon 2020, H2020-WIDESPREAD-01–2016–2017-TeamingPhase2 under Grant Agreement No. 739508, CAMART2 project.