Calibration of a CeBr3 based γ-spectrometer for onsite and laboratory radioactivity measurements in sediment samples

E G Androulakaki; C Tsabaris; F Maragkos; D L Patiris; F K Pappa; G Eleftheriou; S Alexakis; M Kokkoris; R Vlastou

doi:10.1016/j.apradiso.2020.109124

Calibration of a CeBr₃ based γ-spectrometer for onsite and laboratory radioactivity measurements in sediment samples

Appl Radiat Isot. 2020 Jun:160:109124. doi: 10.1016/j.apradiso.2020.109124. Epub 2020 Mar 4.

Authors

E G Androulakaki¹, C Tsabaris², F Maragkos³, D L Patiris², F K Pappa², G Eleftheriou², S Alexakis², M Kokkoris³, R Vlastou³

Affiliations

¹ Hellenic Centre for Marine Research, Institute of Oceanography, P.O. Box 712, GR-19013, Anavyssos, Greece. Electronic address: frosso.androulakaki@hcmr.gr.
² Hellenic Centre for Marine Research, Institute of Oceanography, P.O. Box 712, GR-19013, Anavyssos, Greece.
³ Department of Physics, National Technical University of Athens, Zografou, Athens, 15780, Greece.

PMID: 32174467
DOI: 10.1016/j.apradiso.2020.109124

Abstract

The calibration of an underwater spectrometer, consisting of a CeBr₃ crystal, is performed for sediment sample measurements, via experimental data and Monte Carlo simulations. The system was implemented for activity concentration measurements in marine sediment samples in the laboratory. The results were compared with corresponding high resolution measurements and showed that the system provides accurate results, but relatively high uncertainties. Different measurement geometries are theoretically studied via Monte Carlo simulations in order to improve the system performance for such measurements.

Keywords: CeBr(3) crystal; Marine sediment; Marinelli beaker; Monte Carlo simulations.