After subsequent magnetic and electrostatic analysis, the ions are identified in an ion detector.
Prepared graphite targets are sent to an AMS laboratory for the measurement (at present to Pozna Radiocarbon Laboratory, Poland or to Leibniz Laboratory for Radiometric Dating and Isotope Research in Kiel, Germany).
Each batch of samples is accompanied by at least two modern standard (Oxalic Acid) and two background (coal or marble containing no radioactive carbon) samples, prepared in the same way as samples of unknown age which are used for the age calculation.
Thomas Titscher BAM Federal Institute for Materials Research and Testing Division 7.0 Safety of Structures Unter den Eichen 87 12205 Berlin Thomas.
AMS Laboratory, Inter-University Research Facility Institute, Seoul, Korea National Institute for Environmental Studies NIES, Tsukuba, Japan Nagoya University Tandetron AMS System MALT (Micro Analysis Laboratory Tandem Accelerator) PKUAMS Peking University Accelerator Mass Spectrometer Accelerator Mass Spectrometry - Australian National University Australian Nuclear Science and Technology Organisation.
Directly before the graphitisation the iron is oxidized and reduced in order to increase its catalytic properties.
Then COO is produced and continuously removed by freezing out in a mixture of dry ice and alcohol.
The graphite is deposited on the iron powder introduced into a small quartz tube.
The reactor and iron powder are previously heated overnight at 90°C under continuous pumping.
C dating of samples containing as little as a few milligrams of carbon, which is ca.
1000 times less than in the conventional techniques.
Most commonly the AAA (acid-alkali-acid) method is used for organic samples like charcoal or organic remains.