Proton decay traces (IMAGE) University of Jyväskylä - Jyväskylän yliopisto Caption Two examples of a trace recorded for the fast proton decay of 149Lu. Credit University of Jyväskylä Usage Restrictions Can be used in news and social media postings with picture credit information included. 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.