Neutron-absorbing 'wall' (IMAGE) DOE/Oak Ridge National Laboratory Caption Oak Ridge National Laboratory’s Leah Broussard shows a neutron-absorbing "wall" that stops all neutrons but in theory would allow hypothetical mirror neutrons to pass through. Credit Genevieve Martin/ORNL, U.S. Dept. of Energy Usage Restrictions None. 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.