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Laboratory for the determination of radionuclides

Natural and anthropogenic radionuclides are very helpful tracers for the understanding of oceanic processes. In our department radio nuclides are used for age determinations of coastal sediments (e.g. Am-241, Cs-137, Pb-210, Po-210) and quantifications of submarine groundwater discharge (e.g. Ra-224, Ra-223, Ra-228, Ra-226). For the measurements of radionuclides we use gamma spectrometry, alpha spectroscopy and a radium delayed coincidence counter. 

Datierung von Küstensediementen

Equipment

  • two high-purity Germanium detectors (CANBERRA BE3830P)
  • Alpha Spectrometer (ORTEC Octête)
  • Radium delayed conincidence counter (RaDeCC)
  • CEM Mars 6 Microwave

 

Gamma Spectrometer       Gamma Spectrometer       Radium delayed coincidence counter

Sediment Laboratory

Profile
The Sediment laboratory of the working group „Sedimentology, Coastal- and Continental Shelf Research“ provides facilities for investigating water samples as well as  sediment samples (e.g. suspended matter, soils, marine- and terrestrial sediments etc.). Beside sample preparation for sedimentological investigations (e.g. elimination of carbonate and organic matter, wet sieving etc.), the following analyses can be accomplished by default:

  • Determination of physical parameters ( e.g. particle sizes and distributions, measurements of water content, dry density)
  • Conductivity measurements
  • Suspended matter analyses
  • Determination of combustion loss
  • Statistical analyses


By Laser particle size analyses a grain size range of 0,04 -2000 µm can be covered and weight determinations can be implemented up to an accuracy of 0,002 mg.

Einrichtung des Sediment-Labors Einrichtung des Sediment-Labors

 

Equipment

  • Beckmann LS 13320 Particle Size Analyzer
  • Muffel furnace: Thermo Scientific - Heraeus™ M 104
  • Centrifuge: Thermo Scientific - Sorvall™ ST 40
  • Drying oven: Memmert UFP800DW
  • Satorius precision scales (CPA 224 s, CPA 26 p)

 

Utilisation

  • Laboratory sessions and tutorials for students
  • Semester projects
  • Doctoral theses, Master theses , Bachelor theses
  • R & D projects

 

Contact: Dr. Peter Richter

Sieving Laboratory

For implementation of sieving analyses three sieving stacks (Retsch AS200) are available. Sieving analyses can be accomplished after DIN 66165 or DIN 66165-1 and with ASTM standards.

Einrichtung Sieving Lab

Contact: Dr. Peter Richter

Equipment