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50.0 MB (1.6 MB compressed)
4870 x 3588 pixels
41.1 x 30.5 cm ⏐ 16.2 x 12.0 in (300dpi)
GORONWY TUDOR JONES, UNIVERSITY OF BIRMINGHAM / SCIENCE PHOTO LIBRARY GORONWY TUDOR JONES, UNIVERSITY OF BIRMINGHAM / SCIENCE PHOTO LIBRARY
Tracks of electrons and positrons. These tracks show part of a shower of particles, moving from top to bottom through a hydrogen-neon bubble chamber. The shower was triggered by a collision between a neutrino and a neon nucleus. The tracks spiralling inwards anticlockwise are produced by electrons. Anti-electrons (or positrons) are spiralling inwards clockwise. The paired tracks appearing from a point source are electron-positron pairs formed from high-energy photons in a process known as pair-creation. This photograph was taken in the 15-foot bubble chamber at Fermilab. The region shown here is about 1 metre wide.
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