Giuseppe Occhialini

…chamber, he and Italian physicist Giuseppe Occhialini were able to identify the positron that had been discovered by American physicist Carl Anderson with the antiparticle of the electron that had been predicted by English physicist Paul Dirac.

Moreover, Patrick Blackett and Giuseppe Occhialini, working, like Chadwick, at the Cavendish Laboratory, had revealed how positrons and electrons are created in pairs when cosmic rays pass through dense matter. It was becoming apparent that the simple pictures provided by electrons, protons, and neutrons were incomplete and that a…