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04-Sep-2019 15:05

We use the peak trace of Cs-137 to determine the stratigraphic interval that was deposited in 1954.Pb-210 activity within sediment can be used to estimate accretion rates.CEN radiochronology laboratory also offers Pb-210 dating.It is possible to count the following radionuclides: Pb-210, Cs-137, Am-241, Cd-109, Co- 57 as well as Ra-226 (which is the average of Pb-214 and Bi-214) in sediments using the HPGe method (High-Purity Germanium detector). These steps (drying of the sample, crushing and homogenization) can be done by the customer, or by our people at the laboratory, which will make for a slightly higher price per sample.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.

The total inventory of Cs-137 in the Baltic Sea sediments was estimated to be about 2 280 TBq in 2010.This continues over time and a vertical accretion of mud accumulates leaving a record of the past.We sample the mud by coring and collecting through it, then run dried and crushed mud samples through the Gemanium Gamma Detector to measure Cs-137 and Pb-210 levels.Nonetheless, most of the radioactivity in the sediments of the Baltic Sea originates from naturally occurring radionuclides.At present the radioactivity in the sediments is not expected to cause harmful effects to the Baltic Sea wildlife.

The total inventory of Cs-137 in the Baltic Sea sediments was estimated to be about 2 280 TBq in 2010.This continues over time and a vertical accretion of mud accumulates leaving a record of the past.We sample the mud by coring and collecting through it, then run dried and crushed mud samples through the Gemanium Gamma Detector to measure Cs-137 and Pb-210 levels.Nonetheless, most of the radioactivity in the sediments of the Baltic Sea originates from naturally occurring radionuclides.At present the radioactivity in the sediments is not expected to cause harmful effects to the Baltic Sea wildlife. Applications are in the areas of Late Quaternary geochronology, sedimentology and biochronology.