@article{10272/20147,
year = {2021},
url = {http://hdl.handle.net/10272/20147},
abstract = {This work aims to determine natural radionuclides (210Pb, 228,226Ra, 234,228Th and 40K) in NORM samples by well-type HPGe detectors because they are of vital importance in studies on environmental samples. For this, a novel methodology has been developed, based on obtaining a general function for the full-energy peak efficiency (FEPE) versus the sample apparent density and composition, keeping the sample height constant. To obtain the general FEPE function, a calibration in efficiency has been accomplished using certified standards provided by 
IAEA (RGU-1 and RGTh-1), and KCl. Besides, different self-absorption correction functions were compared for cylindrical geometry, where chemical compositions need to be known. Then, a study on using an anti-Compton system was done, getting a lower detection limit and allowing to propose gamma spectrometry as an alternative technique to alpha-particle spectrometry. Finally, the followed methodology to calculate the FEPE was subjected to internal and external validations, checking its validity range.},
organization = {Funding for open access charge: Universidad de Huelva / CBUAThis research was partially funded by a project of the Regional 
Government of Andalusia “Basic processes regulating the fractionations 
and enrichments of natural radionuclides under acid mine drainage 
conditions” (Ref.: UHU-1255876), and a project of the Projects for Novel 
Principal Investigators “Quantitative study of the variables involved in 
the radon exhalation rate for granular solids; application to rafts of 
granular solid phosphogypsum” (Ref.: UHUPJ-00005-632). A.B.L. acknowledges support from funds provided by the Spanish Ministry of Science, Innovation and Universities’ Research Agency and co-financing 
provided by the European Social Fund (ESF) and the Spanish National 
Youth Guarantee Implementation Plan under Contract No. PEJ2018-002676-A.},
publisher = {Elsevier},
title = {A general methodology to determine natural radionuclides by well-type HPGe detectors},
doi = {10.1016/j.measurement.2021.109561},
author = {Barba Lobo, Alejandro and Gutiérrez de San Miguel Herrera, Enrique and Lozano Bermejo, Rafael Luis and Bolívar Raya, Juan Pedro},
}