NAUTILUS (IMAGE) Naval Research Laboratory Caption Evan Groopman, a research physicist, inserts Nuclear Signatures Inter-laboratory Measurement Evaluation Program (NUSIMEP-9) uranium particles on a carbon planchette into the NAUTILUS to analyze the uranium isotopic composition in the Accelerator Mass Spectrometry Laboratory at the U.S. Naval Research Laboratory in Washington, D.C., Sept. 5. Credit (U.S. Navy photo by Nicholas E. M. Pasquini) Usage Restrictions None 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.