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Mass spectrometry 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. Injecting negatively charged carbon ions from the material being analysed into a nuclear particle accelerator based on the electrostatic tandem accelerator principle. The negative ions are accelerated towards the positive potential.
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Overview of Mass Spectrometry for Protein Analysis

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Mass Spectrometry Applications Areas | Thermo Fisher Scientific - US

Accelerator mass spectrometry AMS is a technique for measuring long-lived radionuclides that occur naturally in our environment. AMS uses a particle accelerator in conjunction with ion sources, large magnets, and detectors to separate out interferences and count single atoms in the presence of 1x10 15 a thousand million million stable atoms. They are used for a wide variety of dating and tracing applications in the geological and planetary sciences, archaeology, and biomedicine. The following is a brief description of each element of the AMS system. The ion source produces a beam of ions atoms that carry an electrical charge from a few milligrams of solid material.
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Accelerator mass spectrometry

Environment, Earth and Ecosystem Sciences. This laser is used to ablate areas of sample a few 10s of microns across and extracts small gas samples for geochronology or noble gas analyses. Another major use of this system has been the determination of the diffusion and partition paramaters for noble gases from He to Xe laboratory experiments, and helium diffusion in apatite. The resulting gas is extracted via an all metal extraction line and cleaned by 3 AP getters.
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