Giuseppe Occhialini and Patrick Blackett combined electronic counters with a cloud chamber to photograph rare penetrating-radiation events. A coincidence signal selected moments when a particle crossed the apparatus, greatly improving the yield over unselected expansions. The resulting magnetic-field photographs recorded groups of tracks and evidence for light positive particles. The method connected fast electronic selection with a detailed image that could be examined after the event.[ref]
Some Photographs of the Tracks of Penetrating Radiation by Patrick Maynard Stuart Blackett and Giuseppe Paolo Stanislao Occhialini. 1933, counter-controlled cloud chamber and charged-track photographs
A physicist.[ref]
https://www.fisica.unimib.it/it/dipartimento/beppo-occhialini. Independent professional profile
Portrait of Giuseppe Occhialini
. Unknown author; source Università degli Studi di Milano-Bicocca (unimib.it), Giuseppe Occhialini: dagli atomi alle stelle. Public domain (PD-anon-70-EU). Source usage terms, via Wikimedia Commons. Source. Articles by others on the same topic
Giuseppe Occhialini was an Italian physicist known for his pioneering contributions to the field of particle physics and cosmic rays. He was instrumental in the development of techniques for the study of high-energy particles and was involved in significant experiments that contributed to the understanding of fundamental particles and interactions. Occhialini is also notable for his work during the early and mid-20th century, including his collaboration with other prominent scientists.