EGU21-14208
https://doi.org/10.5194/egusphere-egu21-14208
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Internal dose rate in quartz grains: Implications for luminescence dating 

Grzegorz Poręba, Agnieszka Szymak, Piotr Moska, Konrad Tudyka, and Grzegorz Adamiec
Grzegorz Poręba et al.
  • Silesian University of Technology, Institute of Physics CSE, Gliwice, Poland (grzegorz.poreba@polsl.pl)

This study assesses how internal dose rate in quartz grains impacts luminescence dating.  In 2018, the Gliwice Luminescence Laboratory implemented innovative μDose system which combines advantages of alpha and beta counting measurement techniques with additional radioactive identification capabilities. The device allows measurements of small samples and results verification with an independent high-resolution gamma spectrometry method. 

All measurements of internal dose rate were made on  pure quartz grains after standard chemical pretreatment. Grains with diameters between 125 and 200 μm were selected for measurements. This material was dried and grounded to approx. 20 μm using a planetary ball mill prior to measurements on the μDose systems.  

Internal dose rate reported here is particularly important because of low (about 0.8-0.9 Gy/ka) or very low (0.4-0.6 Gy/ka) external dose rates. Internal dose rate in quartz grains in our measurements is a significant fraction of the total dose rate, often exceeding 10%. Ignoring this correction would make luminescence ages in our study artificially older.

Presented results were obtained with support of Polish National Science Centre, contract number 2018/30/E/ST10/00616 

How to cite: Poręba, G., Szymak, A., Moska, P., Tudyka, K., and Adamiec, G.: Internal dose rate in quartz grains: Implications for luminescence dating , EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-14208, https://doi.org/10.5194/egusphere-egu21-14208, 2021.

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