OMIKRON / SCIENCE PHOTO LIBRARY OMIKRON / SCIENCE PHOTO LIBRARY
HIstoric image taken from a cloud chamber. The bold geometric pattern of this cloud chamber photograph is made by the disintegration of carbon and oxygen nuclei by 90 million electron volt neutrons from the 4,000-ton, 184-inch cyclotron at the Lawrence Berkeley National Laboratory. The heavy tracks are made by heavy nuclear particles propelled from the exploding nuclei.
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