This picture is taken with light generated by the most radioactive of the 10 surviving historical radium sources at the University of Glasgow, and now cared for by the Radiation Protection Service and the Hunterian museum.
It shows a sodium iodide crystal glowing under the influence of gamma rays from sample number 4, formerly stored in the "Soddy Box". This sample is extremely radioactive, so the photograph was taken in the dark, using a mirror, with a thick wall of lead bricks between the sample and the photographer.
It shows a sodium iodide crystal glowing under the influence of gamma rays from sample number 4, formerly stored in the "Soddy Box". This sample is extremely radioactive, so the photograph was taken in the dark, using a mirror, with a thick wall of lead bricks between the sample and the photographer.
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| © University of Glasgow Photographic Unit |
The photograph makes the glow look very bright, but this is due to a long exposure. In fact, the glow was only just visible to the naked eye.
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