Scintillator Sample (IMAGE) Johannes Gutenberg Universitaet Mainz Caption The experiment constructed in a laboratory in Mainz is designed to measure the scattering lengths of light in a scintillator sample. It is an important component that will help optimize the function of the JUNO scintillator. Credit photo/©: Paul Hackspacher, JGU Usage Restrictions This image may only be used in connection with the press release "German Research Foundation approves new research group to determine neutrino mass hierarchy", issued by Johannes Gutenberg University Mainz on Jan. 4, 2016. 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.