False-colour streamer chamber photo of a pion- muon- electron (pi-mu-e) decay chain resulting from an antiproton annihilation. The antiproton enters f

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False-colour streamer chamber photo of a pion- muon- electron (pi-mu-e) decay chain resulting from an antiproton annihilation. The antiproton enters from the bottom of the picture & annihilates with a proton in neon gas filling the chamber; their energy materialises as 3 nuclear fragments (thick tracks) & several positive & negative pions (less dense tracks). One positive pion curls tightly to the right in the chamber's magnetic field before decaying to a muon; the muon forms the spiral at top & then decays in turn to an electron. At each decay the tracks change direction sharply, indic- ating simultaneous emission of an unseen neutrino. Photo taken at Experiment PS 179 at CERN, Geneva.

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Size: 3147px × 4285px
Photo credit: © PROF. G PIRAGINO/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 179, action, cern, chamber, electron, energy, event, experiment, force, image, images, impact, magnified, microscopic, motion, move, movement, moving, muon, particle, photo, photos, physics, pi-mu-, pion, ps, spiral, streamer, subjects