1) Isotoop datering
- Radiocarbon dating
The Centre for Isotope Research (CIO) conducts radiocarbon-based research, and offers a radiocarbon dating service. Operating continuously since the early 1950s, the CIO now houses the longest-running radiocarbon dating laboratory in the world. The facility recently received a major upgrade, which included the installation of a state-of-the-art MICADAS accelerator mass spectrometer (AMS). Samples can be send to us as specified at the customer page.
The isotope 14C is produced in the atmosphere by cosmic rays, and enters organisms because of photosynthesis by plants, and because these plants directly or indirectly serve as food for animals and humans. 14C content in the organism is in principle constant during lifetime, but decays slowly after death (figure 1). The time after death of an organism can then be determined from its relative 14C content.
Radiocarbon - radiometric
The original method to determine14C concentration is based on couting radio-active decay. A high precision is possible with this method, but to get that result a large sample and a long measurement time are needed. The Center of Isotope Research has both the instrumentation for the original method and the newer method based on Accelerated Mass Spectrometry and is setting up a method based on Laser Spectrometry, giving great opportunity to compare all methods and to check calibrations. The original method is by now restricted to some samples where size does not matter.
We develop methods based on14C measurements to independently quantify and verify the biogenic and fossil carbon fractions of fuels, flue gas CO2and atmospheric CO2. In the section background more details can be found about the background of this field of research.
The main objective is to gain knowledge about the sources and sinks of the main long-lived anthropogenic greenhouse gases CO2, CH4 and N2O.
|Last modified:||15 April 2019 4.41 p.m.|