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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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Roemer, Olaus roemerite roentgen roentgen current roentgen diffractometry roentgen equivalent man roentgen equivalent physical roentgen equivalent physical (rep) roentgen meter roentgen optics roentgen per hour at one meter Roentgen ray roentgen rays roentgen spectrometry Roentgen, Abraham |
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