Artistic Impression of Nuclear Excitation (IMAGE) U.S. Army Research Laboratory Caption The cover image is an artistic impression of the process of nuclear excitation by electron capture. A highly stripped ion, illustrated here as an atomic nucleus with a single orbiting electron, captures an incident electron into a vacant orbit. Under the right conditions, this capture transfers a small amount of energy into the nucleus, which subsequently emits a much larger amount of energy in the form of gamma rays. Credit Image courtesy of ARL's James J. Carroll, William Parks and Eric Proctor Usage Restrictions None License Licensed 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.