Inside a Coulomb Crystal (IMAGE) University of Basel Caption This is a simulation of spatial distribution of individual nitrogen ions (green) in the interior of a Coulomb crystal of laser-cooled calcium ions (blue). Credit Illustration: University of Basel, Department of Chemistry 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.