RT Journal Article
T1 An upgraded lab-based method to determine natural γ-ray emitters in NORM samples by using Ge detectors
A1 Barba Lobo, Alejandro
A1 Mosqueda Peña, Fernando
A1 Bolívar Raya, Juan Pedro
AB The regulation existing on NORM activities requires the accurate and quick measurement of natural radionuclides in a wide range of matrices by gamma spectrometry. The aim of this work has been to develop a comprehensive and accurate methodology to determine natural long-lived radionuclides (210Pb, 228,226Ra, 234,228Th and 40K) by gamma spectrometry with Ge detectors in NORM samples. An exhaustive calibration method to obtain the full-energy peak efficiency (FEPE), for each gamma emission energy, as a function of the thickness, apparent density and matrix composition of the cylindrical sample, has been developed. The selected certified calibration standards contain only natural radionuclides belonging to the 238U- and 232Th-series as well as 40K (codes RGU-1, RGTh-1 and RGK-1 from IAEA). Then, the obtained FEPE curves were validated using Genie 2000 simulations and Certified Reference Materials, for which the self-attenuation corrections were considered. Finally, a study on 222Rn losses was done for several samples.
PB Elsevier
SN 0263-2241
YR 2021
FD 2021-09-11
LK http://hdl.handle.net/10272/20392
UL http://hdl.handle.net/10272/20392
LA eng
NO Barba Lobo, A., Mosqueda, F., Bolívar, J.P.: "An upgraded lab-based method to determine natural γ-ray emitters in NORM samples by using Ge detectors". Measurement, Vol. 186, 110153, (2021). https://doi.org/10.1016/j.measurement.2021.110153
NO Funding for open access charge: Universidad de Huelva / CBUA
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026