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A team of researchers has successfully demonstrated a new method for producing a beam of polarized positrons, a method that could enable a wide range of applications and research, such as improved product manufacturing and polarized positron beams to power breakthrough scientific research.

Jefferson Lab Staff Scientist Grigory Eremeev has just been awarded a five-year grant through DOE's Early Career Research Program to double the efficiency of some of the most efficient particle accelerators being used for research.

Diamonds are one of the most coveted gemstones. But while some may want the perfect diamond for its sparkle, physicists covet the right diamonds to perfect their experiments. The gem is a key component in a novel system that enables precision measurements that could lead to the discovery of new physics in the sub-atomic realm -- the domain of the particles and forces that build the nucleus of the atom.

The newly upgraded accelerator at the US Department of Energy's Thomas Jefferson National Accelerator Facility has delivered full-energy electrons as part of commissioning activities for the ongoing 12 GeV Upgrade project. At 4:20 p.m. on Monday, operators of the Continuous Electron Beam Accelerator Facility delivered the first batch of 12 GeV electrons (12.065 GeV) to its newest experimental hall complex, Hall D.

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.

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.