Resolved: A Long-Debated Anomaly in How Nuclei Spin
Department of Energy, Office of ScienceAtomic nuclei vary in shape from prolate to oblate, and these shapes have different moments of inertia, such that it takes different amounts of energy to spin different nuclei. Previous research has suggested that the amount of energy to spin some nuclei ever faster changes unexpectedly due to an anomalous increase in the moment of inertia, possibly because nuclei start to bulge out. New simulations have found instead that the moment of inertia does not change but several competing prolate and oblate shapes emerge that on average appear spherical.