GoKawiilNorthwestern physicists hold single positron in trap for over a month
A team led by Gerald Gabrielse at Northwestern University captured an individual positron—the antimatter counterpart of the electron—and kept it suspended in a vacuum trap for more than a month, publishing the results in Physical Review Letters. The positrons were produced from decaying sodium-22 atoms, then slowed using a tungsten crystal lattice before being guided by electromagnetic fields into isolation.