A novel apparatus at the U.S. Department of Energy's (DOE) Argonne National Laboratory has made extremely precise measurements of unstable ruthenium nuclei. The measurements are a significant ...

In a single experiment, physicists have measured the "excess" emission of high-energy gamma rays from more than a dozen heavy, unstable atomic nuclei. Mapping the gamma-ray emissions of so many ...

Scientists have precisely measured two unstable atomic nuclei that play a crucial role in explosive X-ray bursts on neutron stars. The results reveal faster nuclear reactions than previously thought, ...

The nuclei of certain atoms are stable and under ordinary circumstances, stable nuclei do not undergo change. The nuclei of other atoms are unstable. These nuclei undergo change spontaneously, that is ...

Figure 1: Radioactive cesium-137 ions created by bombarding a block of uranium carbide with energetic electrons are directed to a fixed location in an electron storage ring. Electrons circulating in ...

Experimental detection of the unstable nucleus magnesium-18 hints at a weakening of the so-called magic number for the closed shell of eight neutrons. Atomic nuclei are typically only stable when they ...

Wei Jia Ong, a staff scientist at Lawrence Livermore National Laboratory (LLNL), was named a 2026 recipient of the U.S.