Cs 137 sediment dating
This approach can also be used in a number of other ways to investigate the distribution of radioisotopes in the environment through measurements of a wide range of environmental and ecological samples.UK Environmental Change Research Centre, University College London ( Before sending samples for analysis it is important to contact either Handong Yang or Neil Rose (see Contacts) regarding up-to-date costs and the time from receipt of samples to reporting as this can vary depending on demand.The highest amounts occur in the sediments of the Bothnian Sea and the eastern Gulf of Finland.
The main sources of Cs-137 have been the fallout from the Chernobyl accident in 1986 and the global fallout caused by nuclear weapon tests in the 1950s and 1960s .
The UCL Environmental Radiometric Facility is located within the Department of Geography, University College London and uses low-background hyper-pure germanium gamma spectrometers capable of measuring low-level environmental radioactivity. This enables chronologies of 100 - 150 years to be accurately determined.
The facility has undertaken these analyses for research projects based in many areas of the world.
With every shipment of many unknown-age samples we must add samples coming from oxalic acid transformation (which is the international standard reference material for all radiocarbon laboratories), inert samples to determine the background value (blanks) as well as known-age samples (secondary standards), coming from multi-laboratory calibration.
This procedure assures a never-ending following of the quality, accuracy and precision of the results given to customers.