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UCL Home  /  Geography  /  Resources  /  UCL Environmental Radiometric Facility

UCL Environmental Radiometric Facility

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About

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.

The facility currently employs four ORTEC® HPGe GWL series coaxial well-type gamma detectors, each housed in a 100mm thick lead shield. Resulting spectra may be analysed for different environmental radioisotopes including 210Pb, 226Ra, 137Cs, 134Cs, 241Am, 7Be and 40K.

The facility was established in 2005 since when the main application has been for the radiometric dating of lake sediments and peats via the measurement of 210Pb, 137Cs and 241Am. 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.

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.

 

Applications

  • Radiometric dating of lake, marine and coastal sediments and peat accumulations by establishing chronologies and accumulation rates through the measurement of atmospheric fallout of naturally produced 210Pb and artificially produced 137Cs and 241Am radionuclides.
  • Determining the extent of sediment focusing within a lake basin by measuring 210Pb distribution in sediment cores from across the accumulation zone
  • Modelling the transfer of radionuclides through catchment-lake systems and assessing soil erosion in catchments by investigating inventories of environmental radioisotopes such as 210Pb, 137Cs, 134Cs and 241Am in soils as well as in sediments and peats
  • Tracing atmospherically deposited pollutants through terrestrial and lake ecosystems by comparing distributions of 210Pb and other pollutants, in particular trace metals.
  • Monitoring radioactive discharges and emissions from nuclear and non-nuclear sites; assessing state and changes of gamma radiation does rates in the environment.
  • Archaeological studies. The planar detector can be used for large samples (250mm diameter and 460mm high internal chamber) and offers a non-destructive means of determining approximate U-content and disequilibrium status for age estimation. This approach has been used to provide an age for Neanderthal skull remains
  • Research collaboration

    UK

    Environmental Change Research Centre, University College London (www.ecrc.ucl.ac.uk)

    Environmental Radioactivity Research Centre, University of Liverpool (http://www.liv.ac.uk/info/research/env_modelling/)

    School of Geography, University of Nottingham (http://www.nottingham.ac.uk/geography/index.aspx)

    School of Environment & Life Science, University of Salford (http://www.els.salford.ac.uk/)

    Rest of World

    Department of Geography, Mary Immaculate College, Limerick (http://www.mic.ul.ie/academicdepts/geography/)

    IASMA Research and Innovation Centre, Italy (http://www.ismaa.it/)

    Institute of Ecology, University of Innsbruck (http://www.uibk.ac.at/ecology/)

    Department of Geosciences and Geography, University of Helsinki (http://www.helsinki.fi/geo/english/about.html)

    Institute of Geology & Geophysics, Chinese Academy of Sciences (http://www.igg.cas.cn/)

    Institute of Tibetan Plateau Research, Chinese Academy of Sciences (http://www.itpcas.cas.cn/)

    Department of Biology, University of Bergen (http://www.uib.no/bio/en)

    Recent Research Projects

    List of Research Projects

    The facility has been involved in a number of research projects including the following. Click on the project below for more information:

    Sending samples

    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. When submitting samples, please consider the following requirements:

    Basic information:

    • Site name
    • Location (Latitude; longitude)
    • Sampling date

     

    Samples:

    • For sediment analyses we require 0.5g dry mass of each sample as a minimum. Please send more sample mass if at all possible as this can reduce counting time for samples with low level radionuclide activity and also reduces counting errors derived from background.
    • For core dating work, it is also a good idea to send as many samples as possible at the start. If during the analysis we find we need to request additional samples from you, this can considerably increase the time it takes to complete the work and to send you a report.
    • Samples should be submitted dry. Freeze-drying or air-drying are both fine.

     

    Data:

    • For sediment and soil core samples dry density data are required for the core as these are used for calculating radionuclide inventories.If you do not have these data, sediment dry density may be calculated from the sample’s dry weight (or water content) and the wet density.Please do send us an e-mail if you have any questions about this.

       

      Sending and returning samples:

      • Please send your samples to: Department of Geography, Pearson Building, University College London, Gower Street, London WC1E 6BT, UK. Please mark for the attention of either Dr Handong Yang or Prof. Neil Rose.
      • The analysis is non-destructive and we are happy to return your samples, so do let us know if you want them sent back to you after the analysis is complete.

      Contact Us

      For enquiries, quotes and further information, please contact:

      Facility manager: Dr Handong Yang
      Tel:                            +44 (0)20 7679 0544
      Fax:                           +44 (0)20 7679 0565
      e-mail:                        handong.yang@ucl.ac.uk
      web:                           http://www.geog.ucl.ac.uk/about-the-department/people/research-staff/handong-yang/


      Coordinator: Prof. Neil Rose
      Tel:                            +44 (0)20 7679 0543
      Fax:                           +44 (0)20 7679 0565
      e-mail:                        n.rose@ucl.ac.uk
      web:                           http://www.geog.ucl.ac.uk/about-the-department/people/academics/neil-rose


      Postal Address:
      Department of Geography, Pearson Building, University College London, Gower Street, London WC1E 6BT, UK.