False-colour bubble chamber photograph of the production & decay of a lambda particle. A proton (yellow) enters from the bottom & knocks out an atomic electron (green) before colliding with a proton at rest in the chamber's liquid hydrogen. The collision produces 7 negative pions (blue),9 positive particles (red),which include a proton & a kaon as well as 7 positive pions,& the lambda - which is neutral & therefore invisible. The lambda moves upwards & betrays itself when it decays into a proton (yellow) & a negative pion (purple). Pos- itive particles curve clockwise,negative partic- les anticlockwise in the chamber's magnetic field. Taken at the 80-inch (200cm) bubble chamber at BNL on Long Island,New York | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Brookhaven National Laboratory |
Taille de l’image : | 3410 px × 5079 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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