Impression of a tetra-neutron (IMAGE) Technical University of Munich (TUM) Caption In the tandem Van de Graaff accelerator of the Maier-Leibnitz laboratory on the Garching research campus a team of physicists of the Technical University of Munich (TUM) bombarded a lithium-7 target with lithium-7 atomic nuclei which were accelerated to 12 percent of the speed of light. All measurement results indicate that their experiments produced carbon-10 and the sought-after tetra-neutron. Credit Sonja Battenberg / TUM Usage Restrictions Free for reporting on the Technical University of Munich. 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.