Apr 18 – 23, 2010
Casino Conference Centre
UTC timezone

Routines of <sup>210</sup>Po determination in fluvial sediments for dating purpose

Apr 20, 2010, 11:45 AM
1h 30m
Gallery (Casino Conference Centre)

Gallery

Casino Conference Centre

Reitenbergerova 4/95, Marianske Lazne, Czech Republic
Board: NAM.P29
Poster Nuclear Analytical Methods Poster Session - Nuclear Analytical Methods

Speaker

Ms Tereza Novakova (Nuclear Physics Institute AS CR, Na Truhlarce 39/64, 180 86 Prague)

Description

During the last decades, 210Pb and its daughter 210Po have become widely used radionuclides for sediment dating. In environmental sediments, the total amount of 210Pb is given by two components: (a) supported 210Pb, produced by radioactive decay of 222Rn inside the material, and (b) an unsupported 210Pb component derived from 222Rn which diffuses into the atmosphere where decays. Subsequently, 210Pb is removed by atmospheric precipitation or dry deposition, falling on the land or water surfaces. The dating method often applies determination of 210Po supposing the radioactive equilibrium with 210Pb. Utilized analytical procedures generally consists from several basic parts: (a) isolation of measured radionuclide by leaching or total decomposition of sample matrix or polonium distillation; (b) measurement by alpha spectrometry or by liquid scintillation counting; (c) determination of supported 210Pb. Our contribution will compare several sample preparation techniques and possibilities of measurement with regards to sample matrix, time and instrumentation requests.

Primary author

Ms Tereza Novakova (Nuclear Physics Institute AS CR, Na Truhlarce 39/64, 180 86 Prague)

Co-authors

Ms Gabriela Wallova (Institute of Inorganic Chemistry, Vienna University, Währinger Str. 42, A-1090 Vienna, Austria) Dr Gabriele Wallner (Institute of Inorganic Chemistry, Vienna University, Währinger Str. 42, A-1090 Vienna, Austria) Dr Ivo Svetlik (Nuclear Physics Institute AS CR, Na Truhlarce 39/64, 180 86 Prague) Ms Lenka Tomaskova (Nuclear Physics Institute AS CR, Na Truhlarce 39/64, 180 86 Prague)

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