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Streamer chamber photo of tritium nucleus

Streamer chamber photo of tritium nucleus

A136/0022

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Credit

PROF. G PIRAGINO / SCIENCE PHOTO LIBRARY PROF. G PIRAGINO / SCIENCE PHOTO LIBRARY

Caption

False-colour streamer chamber photo of a tritium nucleus produced at the Low Energy Antiproton Ring (LEAR) at CERN, the European particle physics laboratory outside Geneva. An antiproton enters at the bottom of the picture & annihilates with a proton in the helium-filled chamber to produce the tritium nucleus & 2 pions. The nucleus of tritium, or "heavy hydrogen", has 1 proton & 2 neutrons; it produces the thick curving track at centre right. The pions, one negative, one positive, produce the less dense tracks that shoot off towards top right & top left. Reactions of this kind occurred in the early Universe, when lightweight nuclei such as helium were beginning to form.

Release details

Model release not required. Property release not required.

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