Inside the Atom (IMAGE) DOE/Argonne National Laboratory Caption Argonne Physicists Steven Pieper and Bob Wiringa use Argonne 's parallel supercomputers to calculate the forces that bind together nucleons – protons and neutrons – to form atomic nuclei. These images represent different angular momentum states of the deuteron, a two-body hydrogen nucleus comprising one proton and one neutron. Credit Courtesy: Argonne National Laboratory Usage Restrictions Image available for use with an Argonne acknowledgement. Image may not be used for advertising or other commercial purposes, or in such a way as to imply an endorsement of any product or service by Argonne National Laboratory. 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.