Public Release: 16-Oct-2014
Science Protons hog the momentum in neutron-rich nuclei
Protons and neutrons that have briefly paired up in the nucleus have higher-average momentum, leaving less for non-paired nucleons. Researchers have now shown for the first time that this phenomenon exists in nuclei heavier than carbon, including aluminum, iron and lead and also surprisingly allows a greater fraction of protons than neutrons to have high momentum in these neutron-rich nuclei, contrary to long-accepted theories and with implications for ultra-cold atomic gas systems and neutron stars.
DOE/Office of Science, National Science Foundation, Israel Science Foundation, Comision Nacional de Investigacion Cientifica y Technologica, Centre National de la Recherche Scientifique
Public Release: 14-May-2014 CEBAF beam goes over the hump: Highest-energy beam ever delivered at Jefferson Lab
The Continuous Electron Beam Accelerator Facility at Jefferson Lab has achieved the final two accelerator commissioning milestones needed for approval to start experimental operations following its first major upgrade. The machine has delivered its highest-energy beams ever, 10.5 billion electron-volts through the entire accelerator and into its newest experimental area for the first time.
DOE/Office of Science
The Department of Energy's Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time.