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ISO 21482 is a technical standard that specifies the design and usage of a "supplemental radiation warning symbol", a warning symbol.It is intended to warn people of the dangers of radiation hazards posed by sealed sources, and encourage the viewer to get away from the source.
Gold-198 (198 Au) is a radioactive isotope of gold. It undergoes beta decay to stable 198 Hg with a half-life of 2.69464 days. The decay properties of 198 Au have led to widespread interest in its potential use in radiotherapy for cancer treatments .
Gold is currently considered the heaviest monoisotopic element. Bismuth formerly held that distinction until alpha-decay of the 209 Bi isotope was observed. All isotopes of gold are either radioactive or, in the case of 197 Au, observationally stable, meaning that 197 Au is predicted to be radioactive but no actual decay has been observed. [4]
The new symbol, to be used on sealed radiation sources, is aimed at alerting anyone, anywhere to the danger of being close to a strong source of ionizing radiation. [13] It depicts, on a red background, a black trefoil with waves of radiation streaming from it, along with a black skull and crossbones , and a running figure with an arrow ...
Added specifications to the file:Radiation_warning_symbol.svg radiation warning symbol as described in Hazard_symbol#Ionizing_radiation_symbol: File usage.
English: The new supplementary ionizing radiation warning symbol launched on 15 February 2007 by the International Atomic Energy Agency (IAEA) and the International Organization for Standardization (ISO). Contains radiating waves, a skull and crossbones and a running person, on a red triangle.
Dear Mr. /removed/, Thank you for your email below. Please note that the content of ISO International Standards is copyright protected. However, we will not oppose to the use of the symbol as mentioned in your email as long as the following text is included next to the representation of the symbol: "This symbol is included in ISO 21482:2007.
New minerals approved by the International Mineralogical Association (IMA-CNMNC) are allocated unique symbols consistent with the main listing. New symbols are announced in the newsletters of the IMA-CNMNC. An updated "mineral symbol picker" list [7] is also available for checking on the availability of symbols prior to submission for approval.