roentgen (redirected from roentgen equivalent man (rem))

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.

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Roentgen, R?ntgen

Wilhelm Konrad . 1845--1923, German physicist, who in 1895 discovered X-rays: Nobel prize for physics 1901

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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.