Experimental Validation of the LabSOCS Detector Efficiency Simulation
DOI:
https://doi.org/10.15392/2319-0612.2024.2641Keywords:
HPGe detector efficiency, Monte Carlo simulation, LabSOCS, experimental validationAbstract
The precise knowledge of the detection efficiency for gamma ray spectrometers is often of paramount importance, and its experimental determination can be both time-consuming and challenging, especially for complex geometries and/or extensive sources. A common solution for that is the use of Monte Carlo simulations, and some companies have developed commercial solutions. In the present work, the accuracy of the efficiency values determined by Mirion Industries’ LabSOCS detection efficiency simulator was assessed by determining the activities of point sources measured under five distinct geometries, and comparing the results to the certified activity values. The results show that, while the software delivers reasonably reliable results, it tends to overestimate the efficiency, and special care may have to be taken with the precision of the geometrical measurements.
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[1] DOS SANTOS, R. M. Desenvolvimento de um método para obtenção da eficiência de detecção para detectores HPGe em medidas com fontes extensas, MSc. Dissertation, IPEN/USP, DOI 10.11606/D.85.2012.tde-24082012-162508, 2012
[2] HURTADO, S.; GARCIA-LEON, M.; GARCIA-TENORIA, R. Monte Carlo simulation of the response of a germanium detector for low-level spectrometry measurements using GEANT4, Appl Radiat Isot, v. 61, p. 139 143, 2004. DOI: https://doi.org/10.1016/j.apradiso.2004.03.035
[3] BOSON, J.; GÖRAN, A.; JOHANSSON, L. A detailed investigation of HPGe detector response for improved Monte Carlo efficiency calculations, Nucl. Instrum. Meth. Phys. Res A, v. 587, p. 304—314, 2008. DOI: https://doi.org/10.1016/j.nima.2008.01.062
[4] SUBERCAZE, A. et al. Effect of the geometrical parameters of an HPGe detector on efficiency calculations using Monte Carlo methods, Nucl. Instrum. Meth. Phys. Res A, v. 1039, 167096, 2022. DOI: https://doi.org/10.1016/j.nima.2022.167096
[5] ISOCS™ / LabSOCS™ Calibration Methodology, Available at: https://www.mirion.com/isocs. Access: 27/aug/2024..
[6] BRONSON, F. L. Validation of the accuracy of the LabSOCS software for mathematical efficiency calibration of Ge detectors for typical laboratory samples, J Radioanal Nucl Chem, v. 255, p. 137—141, 2003. DOI: https://doi.org/10.1023/A:1022248318741
[7] STEWART, J. P.; GROFF, D. LabSOCS™ vs. Source-based gamma-ray detector efficiency comparisons for nuclear power plant geometries, In: Proceedings of the 48th Annual Radiobioassay & Radiochemical Measurements Conference, Knoxville, Tennessee, November 11-15, 2002.
[8] NJINGA, R.L.; TSHIVHASE, M. V. A Comparison of LabSOCS and Source-Based Full Energy Efficiency Generation in Measurements, International Journal of Advanced Research, v. 4, p. 1102—1107, 2016.
[9] STANIĆ, G. et al., Angle vs. LabSOCS for HPGe efficiency calibration, Nucl. Instrum. Methods Phys. Res. A, v. 920, p. 81—87, 2019. DOI: https://doi.org/10.1016/j.nima.2018.12.059
[10] SUÁREZ-NAVARRO, J.A. et al., Gamma spectrometry and LabSOCS-calculated efficiency in the radiological characterization of quadrangular and cubic specimens of hardened Portland cement paste, Rad. Phys and Chem., v. 171, 108709, 2020. DOI: https://doi.org/10.1016/j.radphyschem.2020.108709
[11] BARBA-LOBO, A. et al., Robustness of LabSOCS calculating Ge detector efficiency for the measurement of radionuclides, Rad. Phys. Chem., v. 205, 110734, 2023. DOI: https://doi.org/10.1016/j.radphyschem.2022.110734
[12] CANBERRA INDUSTRIES, Genie-2000 Spectroscopy System v.3.41 -- operations manual, Meriden, USA, 2012.
[13] Evaluated Nuclear Structure Data File (ENSDF), Available at: https://www nds.iaea.org/relnsd/NdsEnsdf/QueryForm.html. Access 27/aug/2024.
[14] ZAHN, G. S. et al. Uncertainty Analysis in Comparative NAA Applied to Geological and Biological Matrices. In: PROCEEDINGS OF THE 2015 INAC, Santos, October 4-9, 2015.
[15] ZEVALLOS-CHÁVEZ, J. Y. et al. Study of the inactive layer of a germanium detector: experimental and Monte Carlo simulation treatment, PROCEEDINGS OF THE 2005 INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, Santos, 28 August to 2 September, 2005.
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Copyright (c) 2024 Guilherme Soares Zahn, Frederico Antonio Genezini
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