Mass spectrometry radiocarbon dating
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Radiocarbon dating
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Accelerator mass spectrometry - Wikipedia
Accelerator mass spectrometry AMS is a form of mass spectrometry that accelerates ions to extraordinarily high kinetic energies before mass analysis. The special strength of AMS among the mass spectrometric methods is its power to separate a rare isotope from an abundant neighboring mass "abundance sensitivity", e. This makes possible the detection of naturally occurring, long-lived radio-isotopes such as 10 Be, 36 Cl, 26 Al and 14 C. AMS can outperform the competing technique of decay counting for all isotopes where the half-life is long enough. Generally, negative ions are created atoms are ionized in an ion source. In fortunate cases this already allows the suppression of an unwanted isobar, which does not form negative ions as 14 N in the case of 14 C measurements.



Accelerator Mass Spectrometry (AMS) Dating
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Accelerator Mass Spectrometry AMS is a technique for measuring the concentrations of rare isotopes that cannot be detected with conventional mass spectrometers. The original, and best known, application of AMS is radiocarbon dating, where you are trying to detect the rare isotope 14 C in the presence of the much more abundant isotopes 12 C and 13 C. The natural abundance of 14 C is about one 14 C atom per trillion 10 12 atoms of 12 C. A nuclear particle accelerator consists essentially of two linear accelerators joined end-to-end, with the join section called the terminal charged to a very high positive potential 3 million volts or higher.
