Decay Energy (IMAGE) Johannes Gutenberg Universitaet Mainz Caption The new result (red) confirms the recent results for the decay energy of 163Ho. The various symbols stand for different measurement techniques. Credit Ill./©: Max Planck Institute for Nuclear Physics Usage Restrictions This image may only be used in connection with the press release "Solving a long-standing atomic mass difference puzzle paves way to the neutrino mass" provided by Johannes Gutenberg University Mainz. 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.