carbon-14


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carbon-14

[′kär·bən ′fȯr‚tēn]
(nuclear physics)
A naturally occurring radioisotope of carbon having a mass number of 14 and half-life of 5780 years; used in radiocarbon dating and in the elucidation of the metabolic path of carbon in photosynthesis. Also known as radiocarbon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Prof Waldron said: 'We were keen to determine whether we could use carbon-14 dating to measure the pulse of the carbon cycle at both peatland sites.
The alignment of tree-ring and varve carbon-14 with conventional expectations, and the utter failure to align with young-earth expectations, is stunning.
The choice of isotopic labels for APIs varies, but typically includes carbon-14, tritium, deuterium, carbon-13 or nitrogen-15.
Thus the composition of carbon-14 in ivory could tell authorities when an animal lived and died.
Then it gets really interesting: After scraping the nuclear waste, technicians use the extracted carbon-14, in gas form, to make artificial diamonds, using existing techniques.
The method assumes that atmospheric carbon-14 concentrations remain relatively steady.
In the bioAMS system, a substance to be studied is tagged with carbon-14 or another radioactive isotope and ingested or absorbed by a test subject.
Beta Chem previously used the 2,000-square-foot facility, situated in the Noon Industrial Park, for the synthesis of radioactive carbon-14 into pharmaceutical compounds for medical research.
The workshop also covered methods of nuclear analysis including fluorescent and particle-induced X-ray, using the electron microscope, neutron activation analysis, laser-induced breakdown spectroscopy, Carbon-14 radiocarbon dating, thermal radiation, and also nuclear magnetic resonance (NMR) spectroscopy.
It responds to recent discoveries in a variety of fields that the chemical species of an element (Carbon-13 vs Carbon-14, for instance) determines many factors about its bioavailability and toxicity.
The researchers used a powerful carbon-14 identification method to trace four-fifths of the black carbon emitted in China to incomplete combustion of fossil fuel such as coal briquettes used in home cook stoves and automobile and truck exhaust.
The technique compares the amount of carbon-14 (C-14), a less common form of atmospheric carbon, to carbon-12 (C-12), which is more stable and abundant.