EGU2020-16588, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-16588
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Towards a revision of 234U and 230Th decay constants

Inga Kristina Kerber1, Sophie Warken1,2, Axel Gerdes3, and Norbert Frank1
Inga Kristina Kerber et al.
  • 1Institute for Environmental Physics, Heidelberg University, Heidelberg, Germany (ikerber@iup.uni-heidelberg.de)
  • 2Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany
  • 3Institute of Earth Sciences, Goethe University, Frankfurt, Germany

The quality of uranium-series ages depends on the accuracy and precision at which the decay constants of 234U, 230Th and 238U are determined. Here, we present intermediate results for a revision of the decay constants of 234U and 230Th. Therefore, we examined a selection of different materials in secular equilibrium using isotope dilution multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). New approaches of our study in particular concern the characterization of routines for measuring all isotopes on Faraday cups, i. e. low abundance isotopes on cups with 10^13 Ohm amplifiers, and a different selection of materials in comparison to previous studies.  λ_234 could be determined so far at a precision of 24 ε and agrees with the latest literature value of Cheng et al. (2013) within its error margins.

How to cite: Kerber, I. K., Warken, S., Gerdes, A., and Frank, N.: Towards a revision of 234U and 230Th decay constants, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-16588, https://doi.org/10.5194/egusphere-egu2020-16588, 2020

This abstract will not be presented.