Residual Radiation 2 : Radiation resulting from the decay of activated material within the accelerator. Residual radiation persists after beam shut off, and may contribute significantly to the overall dose to radiation workers
Jefferson Lab, Radiation Worker Glossary, Newport News, VA, USA 2007. http://www.jlab.org/div_dept/train/rad_guide/gloss ary.html, (Rad Sfty, Prot and Cont - Amer) {1005}