Nuclear Emulsion Detector (IMAGE) University of Bern Caption The nuclear emulsion detector after exposure to the positron beam. Credit © Ciro Pistillo, LHEP / AEC, University of Bern 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.