Gammasphere From Below (IMAGE) DOE/Argonne National Laboratory Caption Argonne scientists and collaborators used the Gammasphere, this powerful gamma ray spectrometer, to help create the right conditions to cause and spot a long-theorized effect called nuclear excitation by electron capture. Credit Argonne National Laboratory 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.