PET scan particles

Usage examples of positrons.

And when a proton annihilates an antiproton, it produces a pi-zero meson one-third of the time, and a charged pion, a muon, and a neutrino two-thirds of the time, after which the pions and neutrons promptly break down to electrons and positrons, photons and neutrinos.

Alpha particles should shove them out of the way with equal ease, and if positrons make up the brain paths, shoving them away disrupts the brain paths and inactivates the robots.

This depends on injecting very short-lived and presumably non-hazardous radioisotopes into the bloodstream and then detecting, by means of their emission of positrons, where they are in the brain at times up to half an hour or so after injection.

The universe was a mass of electrons, positrons, neutrons, and photons.

Since electrons and positrons, and all the other particles for that matter, are only harmonics of closed strings, the numbers that were created are essentially random.

The neutrons absorbed the positrons to become protons, and the electrons were drawn off.