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Emulsion photo of cosmic ray event

Emulsion photo of cosmic ray event

A134/0005

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Credit

C. POWELL, P. FOWLER & D. PERKINS / SCIENCE PHOTO LIBRARY C. POWELL, P. FOWLER & D. PERKINS / SCIENCE PHOTO LIBRARY

Caption

The power of a cosmic ray is shown in this false- colour emulsion photo of a cosmic ray sulphur nucleus (red) colliding with a nucleus in the emulsion. The collision produces a spray of other particles: a fluorine nucleus (green), other nuclear fragments (blue) & 16 pions (yellow). The length of the sulphur track is 0. The curlicues which adorn the track of the sulphur nucleus are electrons which it has knocked out of atoms in passing. The photograph was taken in 1950 by Cecil Powell, the English physicist who pion- eered the use of photographic emulsions to record the tracks of electrically charged particles.

Release details

Model release not required. Property release not required.

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