FRXAA02
ETH, Zurich, Switzerland
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FRXAA02 |
Low Energy Accelerator Mass Spectroscopy (AMS) | |
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| The technical evolution of AMS is summarized. AMS is the most sensitive isotope selective detection method for long-lived radionuclides, capable of measuring isotopic ratios as low as 1:1016. At present, C-14 is still the most important AMS nuclide but there are many applications of other nuclides such as Be-10, Al-26, Cl-36, Ca-41, I-129, and actinides. A key characteristic of any AMS system is the destruction of molecular interferences and subsequent analyses of atomic ions. In early instruments, highly charged ions (> 3+ ) were used, and fairly high ion energies, and as a consequence, large accelerators were required. Today, 1+ is used, molecular interferences are destroyed in multiple collisions with gas atoms or molecules at energies of a few hundred keV. Thus, C-14 AMS instruments develop towards lab size or tabletop devices. But, low energy AMS is not limited to radiocarbon only and there is a great potential for radionuclides not interfered by nuclear isobars. These developments have launched the wide spread use of AMS in various research fields and has resulted in a boom of new AMS facilities which impact the wide variety of applications of AMS in modern research. | ||
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Slides FRXAA02 [15.830 MB] | |
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