Antiproton spin transitions (IMAGE) Heinrich-Heine University Duesseldorf Caption The trap can be used to measure antiproton spin transitions with the highest accuracy. (Image: BASE-Collaboration / Barbara Maria Latacz) Credit BASE-Collaboration / Barbara Maria Latacz Usage Restrictions No restrictions. License Public Domain 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.