The electron's antimatter counterpart, known as a positron, carries a positive charge.
The photograph is a record of the radiation given off in the electron-positron annihilations.
Now take an electron and the positron, think of them as mirror image's of each other.
There is no further discussion of the detected positron source.
Smash a positron and an electron and you get two or more gamma rays.
When a positron encounters its regular opposite, an electron, both are destroyed in a shower of new particles.
The result is that the electron shadow and the positron shadow are separated.
The collision converts the proton into a positron, the antimatter counterpart of an electron, and a recoiling neutron.
For example, a powerful electric field can generate electron-positron pairs in a vacuum.
Sodium-22 is a positron-emitting isotope with a remarkably long half-life.
British Dictionary definitions for positron
(physics) the antiparticle of the electron, having the same mass but an equal and opposite charge. It is produced in certain decay processes and in pair production, annihilation occurring when it collides with an electron