Purifying isotopes (IMAGE) DOE/Oak Ridge National Laboratory Caption Radiochemist Shelley VanCleve works to purify an isotope using a glove box in ORNL’s Radiochemical Engineering Development Center. VanCleve was involved in the final purification of berkelium that led to the discovery of the new element 117, tennessine, in 2010. Credit Credit: Carlos Jones/ORNL, U.S. Dept. of Energy Usage Restrictions Use with credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.