Fig. 3 (IMAGE) Osaka University Caption Electron-positron pair spectrometer, Super-e. The yellow line in the figure shows the beam irradiation on the target. The electrons and positrons emitted from it (red and green lines) are guided to the Si detector located downstream. Credit T. Kibédi Usage Restrictions Only noncommercial uses of the work are permitted. 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.