Radiocarbon dating laboratory lund

This problem is solved in the tandem accelerator at the stripper —if three or more electrons are removed from the molecular ions the molecules dissociate into their component atoms.The kinetic energy that had accumulated up to now is distributed among the separate atoms, none of which has the same energy as a single 14C ion.The negative ions are accelerated towards the positive potential.At the terminal they pass through either a very thin carbon film or a tube filled with gas at low pressure the stripperdepending on the particular accelerator.At the kinetic energies typically used in an AMS system it is possible to use well-established nuclear physics techniques to detect the individual 14C ions as they arrive at a suitable particle detector.This may be a solid-state detector or a device based on the gridded ionisation chamber.If samples require additional processing, the submitter will be informed of the added cost before work proceeds.

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These two pieces of information are sufficient to completely identify the ion as 14C.It is thus easy to distinguish the 14C from the more intense "background" caused by the dissociated molecules on the basis of their kinetic energy.Accelerating the ions to high energy has one more advantage.This requires sufficient atoms to be present to provide a large enough decay rate, as described above.AMS, on the other hand, does not rely on radioactive decay to detect the 14C.

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