FDG is a radioactive tracer whose emission of these particles results in annihilation, and the resulting gamma rays feature in a medical imaging technique named for them.
Project PAMELA discovered an abundance of these particles while orbiting the Earth in 2008, though the theory of cosmic strings might explain the result. FDG is a radioactive tracer whose emission of these particles results in annihilation, and the resulting gamma rays feature in a medical imaging technique named for them. They were predicted as a consequence of the Dirac equation, and their existence was proven by sending cosmic rays through a cloud chamber leading to diverging beams of charged particles, a result explainable by antimatter. For 10 points, identify this particle discovered by Carl Anderson, an anti-electron usually written as e-plus.
Project PAMELA discovered an abundance of these particles while orbiting the Earth in 2008, though the theory of cosmic strings might explain the result.
{positrons} [accept {anti}-{electron} before mentioned]