CERN / SCIENCE PHOTO LIBRARY CERN / SCIENCE PHOTO LIBRARY
Streamer chamber photograph of 220 charged subatomic particles spilling out from the collision of a high-energy oxygen nucleus with a nucleus in a lead target. The picture was obtained by the NA35 experiment at CERN, the European particle physics laboratory outside Geneva. In addition to the 220 charged particles that leave a track in the streamer chamber, physicists estimated that a further 80 electrically neutral (and therefore invisible) particles were created in the collision. From a run in November 1986.
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