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rare earth screen |
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rare earth screen, n a fluorescent material such as calcium tungstate used as the basis of roentgen-ray intensifying screens. In recent years, new materials, including the rare earths yttrium and gadolinium, have also found application in such devices. These rare earths enable lower radiation doses to be used while producing acceptable film densities. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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