Particle event at Low Energy Antiproton Ring
Numéro d’image : 11518140
| Streamer chamber photo of an event at the Low Energy Antiproton Ring (LEAR) at CERN,the European particle physics laboratory outside Geneva. A 600 MeV antiproton enters at the bottom of the picture & annihilates with a proton in a nucleus of the helium gas that fills the chamber. The collision produces a proton,a positive & negative pion,& a neutral kaon. Being neutral,the kaon leaves no track,but betrays its presence when it decays to a positive & negative pion pair. Reactions of this kind occurred in the early universe,at a time when lightweight nuclei such as helium were beginning to form. The distance between the crosses is 28 cm | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / PROF. G PIRAGINO |
| Taille de l’image : | 3536 px × 3046 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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