10 Things You Didnât Know About Chronic Fatigue Syndrome. Chronic Fatigue Syndrome (CFS) is undeniably complicated in every conceivable way. The disorder has been around for decades, but the medical community has yet to assemble a clear picture of it. The condition is characterized by extreme fatigue that canât be explained by any underlying medical condition.
A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable.
The atom produced by radioactive decay can either be another radioactive atom or a stable (nonradioactive) atom. The radioactive decay modes of most concern for the radionuclides in GTCC LLRW are alpha particle and beta particle emission, and the resultant gamma rays and X-rays that accompany these decay processes.