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roentgen |
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roentgen, r?ntgen a unit of dose of electromagnetic radiation equal to the dose that will produce in air a charge of 0.258 × 10--3 coulomb on all ions of one sign, when all the electrons of both signs liberated in a volume of air of mass one kilogram are stopped completely. Roentgen, R?ntgen Wilhelm Konrad . 1845--1923, German physicist, who in 1895 discovered X-rays: Nobel prize for physics 1901 roentgen [′rent·gən] (nucleonics) An exposure dose of x- or γ-radiation such that the electrons and positrons liberated by this radiation produce, in air, when stopped completely, ions carrying positive and negative charges of 2.58 × 10-4coulomb per kilogram of air. Abbreviated R (formerly r). Also spelled röntgen. 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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Atlas of Normal Roentgen Variants that May Simulate Disease. Highlight of the week was a field trip to the Roentgen Museum to learn about Conrad Roentgen and his discovery of the X-ray. Starting with the discoveries of X rays by Wilhelm Roentgen and of radium by Marie Curie, this book traces the path that led to the detonation of an atomic bomb over Hiroshima, on August 6, 1945. |
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