Calibration of an HPGe detector and self-attenuation correction for Pb-210: Verification by alpha spectrometry of Po-210 in environmental samples

Details

Ressource 1Download: BIB_D120B956F76C.P001.pdf (348.56 [Ko])
State: Public
Version: author
Serval ID
serval:BIB_D120B956F76C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Calibration of an HPGe detector and self-attenuation correction for Pb-210: Verification by alpha spectrometry of Po-210 in environmental samples
Journal
Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment
Author(s)
Saidou , Bochud F., Laedermann J.P., Buchillier T., Moise K.N., Froidevaux P.
ISSN
0168-9002
Publication state
Published
Issued date
2007
Peer-reviewed
Oui
Volume
578
Number
3
Pages
515-522
Language
english
Abstract
In this work the calibration of an HPGe detector for Pb-210 measurement is realised by a liquid standard source and the determination of this radionuclide in solid environmental samples by gamma spectrometry takes into account a correction factor for self-attenuation of its 46.5 keV line. Experimental, theoretical and Monte Carlo investigations are undertaken to evaluate self-attenuation for cylindrical sample geometry. To validate this correction factor (at equilibrium with Po-210 Pb-210) alpha spectrometry procedure using microwave acid digestion under pressure is developed and proposed. The different self-attenuation correction methods are in coherence, and corrected Pb-210 activities are in good agreement with the results of Po-210. Finally, self-attenuation corrections are proposed for environmental solid samples whose density ranges between 0.8 and 1.4 g/cm(3) and whose mass attenuation coefficient is around 0.4 cm(2)/g. (C) 2007 Elsevier B.V. All rights reserved.
Keywords
HPGe calibration, Pb-210, Po-210, self-attenuation correction, environmental solid samples, Monte Carlo simulations, GAMMA-SPECTROMETRY, SIMULATION
Web of science
Open Access
Yes
Create date
28/04/2008 10:15
Last modification date
20/08/2019 15:51
Usage data