Interestingly he does discuss uranium, but not as a fuel (he thinks it would maybe emit X-rays if he shot high energy electrons at it). (blog.nuclearsecrecy.com)
Moving forward the team will look to complete similar experiments but at much higher intensities or with higher energy electron beams. (lifeinism.com)
The crystal structure of Fe3O4 and Fe electrodes analyzed by RHEED (reflection high energy electron diffraction). (sciencedaily.com)