Strontium 90 Dating

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Rubidium-strontium dating - Wikipedia
Strontium-90 - Wikipedia
Strontium-90 | Sr - PubChem
Radionuclide Basics: Strontium-90 | US EPA
Facts About Strontium | Live Science
PDF Epa Facts About Strontium-90
Strontium 90 - an overview | ScienceDirect Topics
Strontium-90 (Sr-90)
NIST - SRM Order Request System SRM 4919I - Strontium-90 . . .
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The rubidium- strontium dating method is a radiometric dating technique used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium (87 Rb) and strontium (87 Sr, 86 Sr) . . Development of this process was aided by German chemists Otto Hahn and Fritz Strassmann, who later went on to discover nuclear fission in December 1938 .
Strontium-90 ( 90 Sr) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28 .8 years . It undergoes β − decay into yttrium- 90 , with a decay energy of 0 .546 MeV . Strontium-90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons and nuclear accidents .
The "bone-seeking" behavior of strontium is the basis for concern regarding oral or inhalation exposures to the radioactive isotopes, particularly strontium-90 , with its long half-life of 29 years and highly energetic 0 .546 MeV beta particles, plus the 2 .2 MeV beta particles of its short-lived yttrium- 90 decay product isotope .
Strontium-90 is widely dispersed in the environment and the food chain from atmospheric testing of nuclear weapons in the 1950s and 1960s . Radioactive decay Radioactive decay The process in which an unstable (radioactive) nucleus emits radiation and changes to a more stable isotope or element . is the only way of decreasing the amount of Sr- 90 . . .
Strontium dating . Most strontium is formed when the element rubidium decays . . . . The strontium isotope Sr- 90 is a nuclear fission product and is released into the environment during nuclear . . .
EPA Facts about Strontium-90 What is strontium-90 ? Radioactive strontium-90 is produced when uranium and plutonium undergo fission . Fission is the process in which the nucleus of a radionuclide breaks into smaller parts . Large amounts of radioactive strontium-90 were produced during atmospheric nuclear weapons tests conducted in the 1950s and . . .
Uses . Strontium compounds are used in making ceramics and glass products, pyrotechnics, paint pigments, fluorescent lights, and medicines . Strontium can also exist as several radioactive isotopes, the most common is 90Sr . Strontium-90 is formed in nuclear reactors or during the explosion of nuclear weapons .
isotop .ru › en › production › medical › 426 › 482
Strontium-90 (Sr- 90 ) Half-Life: 28,8 (years) Sr- 90 is formed in nuclear reactors or during nuclear weapons explosion . It is the parent isotope of Yttrium- 90 which is applied in nuclear medicine to produce radiopharmaceuticals . Sr- 90 is used in electron tubes to treat eye diseases . JSC Isotope is ready to supply you with Sr- 90 .
SRM 4919I - Strontium-90 Radioactivity Standard . Strontium , 90Sr, Sr- 90 , radioactive solutions, radionuclide . - Certificate - MSDS - Table . Note: For SRM's that cannot be ordered online, please email SRM Sales Office at srminfo@nist .gov, or call 301-975-2200, Option 1 . Certificate .
Le strontium 90 est mesuré, dans les échantillons de l'environnement par comptage β de son descendant 90 Y, en scintillation liquide ou sur compteur proportionnel . La procédure nécessite une radiochimie préalable pour extraire le strontium 90 de l'échantillon et le séparer de l'yttrium 90 initialement présent .
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Strontium 90 Dating

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