Sediment accumulation rates were estimated using the 210Pb sediment dating technique which is based on alpha and gamma emitting radionuclides.
The total 210Pb concentration in the sediment was measured with an alpha spectrometer while the activities of supported 210Pb and 137Cs were measured with a gamma spectrometer with high germanium n-type detector.
of Mary Washington, Fredericksburg, VA, USAUniversity of Arkansas, Fayetteville, AR, USAUniv.
of Denver, Denver, Colorado, USAEcology and Environment, Inc.
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.
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.
Alpha Spectroscopy Services (Geochronology and Paleolimnology Services) In particular- Radio isotopic Lead dating - Lead Pb-210 analysis by most frequent method, Alpha Spectroscopy to measure sedimentation rate/sediment accumulation rate to find out age of the sediment (Geochronology and Paleolimnology).
Lead dating - Pb-210 is an isotope in the uranium-238 (U-238) decay series. Although it can occur in secular equilibrium with its grandparent, Pb-210 concentrations are not constant because geo-chemical processes separate Pb-210 from the longer lived parent isotopes in many systems.
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