Roentgen 10 : The special unit of exposure. That amount of gamma or x rays which produce ions carrying one electrostatic unit of charge in one cubic centimeter of dry air. See exposure
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}