Optimization of the gamma-ray spectrometry counting time based on uncertainties of radionuclides concentration in samples
DOI:
https://doi.org/10.15392/bjrs.v8i2.1197Keywords:
Gamma-ray spectrometry, counting time optimization, HPGe detectorAbstract
This paper aims to propose an easy and fast method of optimization of the gamma-ray spectrometry counting time in determining natural radionuclides (Pb-210, Pb-212, Pb-214, Bi-212, Bi-214 and Ac-228) in order to minimize uncertainties in the concentration. The samples were measured by gamma-ray spectrometry with a hyper-pure germanium detector Canberra, 25% relative efficiency, effective resolution of 1.9 keV on the 1332.5 keV 60Co with associated electronics and coupled to a microcomputer. Multichannel Maestro A65-I model was used for spectrum acquisition and peak net area determination, and WinnerGamma/Interwinner 6.01 software was used for gamma-ray spectra analysis and to calculate the concentrations and associated uncertainties. The counting times used were 86,000 s and 150,000 s.
- Views: 209
- PDF Downloads: 206
Downloads
References
GEHRKE, R. J.; DAVIDSON, J. R. Acquisition of quality g-ray spectra with HPGe spectrometers. Appl. Radiat. Isot, v. 62, p. 479-499, 2005.
ODDONE, M.; GIORDANI, L.; GIACOBBO, F.; MARIANI, M.; MORANDI, S. Practical considerations regarding high resolution gamma-spectrometry measurements of naturally occurring radioactive samples. J. Radioanal. Nucl. Chem, v. 277, p. 579-585, 2008.
CURRIE, L. A. Limits for Qualitative Detection and Quantitative Determination. Anal. Chem, v. 40, p. 586-592, 1968.
SHWEIKANI, R.; HASAN, M. Determination of the optimal measurement counting time and detection limit for gamma-ray spectrometry analysis. Accred. Qual. Assur, p. 501-504, 2015. Available at: http://dx.doi.org/10.1007/s00769-015-1169-5>. Last accessed: 11 Jul. 2019.
NISTI, M. B.; SANTOS, A. J. G.; PECEQUILO, B. R. S.; MÁDUAR, M. F.; ALENCAR, M. M.; MOREIRA, S. R. D. Fast methodology for time counting optimization in gamma-ray spectrometry based on preset minimum detectable amounts. J. Radioanal. Nucl. Chem, v. 281, p. 283-286, 2009.
Maestro Software. Maestro for Windows (Emulation software for Gamma Spectroscopy). Model A65-B1Version 3.04, EG&G ORTEC, 1995.
InterwinnerTM 6.0. MCA Emulation, Data Acquisition and Analysis software for Gamma and Alpha Spectroscopy. IW-B32 2004. ORTEC. Oak Ridge, TN, USA, 2004.
TAUHATA, L.; VIANNA, M. E. C.; OLIVEIRA, A. E.; FERREIRA, A. C. M.; CONCEIÇÃO, C. C. S. Metrological capability of the Brazilian laboratories of analyses of radionuclides in environmental samples. Appl. Radiat. Isot, v. 56, p. 409-414, 2002.
Published
How to Cite
Issue
Section
License
Copyright (c) 2020 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
