Comparison of beta (LSC) and gamma (HPGe) spectrometric methods for lead-210 in chronological study

• Autorzy: Mikalauskienė R. , Mažeika J. , Petrošius R. , Szwarczewski P.

Identyfikatory

DOI

10.1515/geochr-2015-0084

• Konferencja: Conference Proceedings of the 12th International Conference “Methods of Absolute Chronology” May 11-13th, 2016, Gliwice-Paniówki, Poland
• Języki publikacji: EN

Abstrakty

EN

The sediments of two lakes located in the Baltic Uplands, the western part of the East European Plain (East Lithuania and North East Poland), were studied. Activity concentration of 210Pb was determined using two nuclear analytical techniques: determination of 210Pb in equilibrium with its beta emitting daughter 210Bi using liquid scintillation counter (LSC), and direct determination of 210Pb (and other radionuclides) by low-background gamma-ray spectrometer with a well type HPGe detector. For the 210Pb determination by LSC the methodology of lead separation based on the anion exchange resin in Cl– form (Eichrom) was used. Several steps of radiochemical procedures and respective parameters were investigated additionally. The optimized procedures for LSC method were used for case study with two lake cores. The activity concentration of 210Pb in lake sediment samples based on both nuclear analytical techniques (LSC and HPGe) were compared. 210Pb dating of cores was performed according to Constant Rate of 210Pb Supply (CRS) model with some modifications. Both techniques in the range of uncertainties gave similar results. From two considered lakes, the more eutrophic one exhibited higher sediment mass accumulation rate (MAR) values.

Słowa kluczowe

EN

210Pb; 210Bi; anion exchange resin; liquid scintillation counting; low-background gamma-ray spectrometry

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2018
• Tom: Vol. 45, no. 1
• Strony: 34--43
• Opis fizyczny: Bibliogr. 36 poz., rys.

Twórcy

autor

Mikalauskienė R.

• Laboratory of Nuclear Geophysics and Radioecology, State Research Institute Nature Research Centre, Akademijos str. 2, Vilnius, Lithuania

autor

Mažeika J.

• Laboratory of Nuclear Geophysics and Radioecology, State Research Institute Nature Research Centre, Akademijos str. 2, Vilnius, Lithuania

autor

Petrošius R.

• Laboratory of Nuclear Geophysics and Radioecology, State Research Institute Nature Research Centre, Akademijos str. 2, Vilnius, Lithuania

autor

Szwarczewski P.

• Department of Geomorphology, Faculty of Geography and Regional Studies, University of Warsaw, Krakowskie Przedmiescie 30, 00-927 Warsaw, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).