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Sima O. Uncertainty and covariance matrix of the coincidence-summing correction factors due to decay-data uncertainties. Appl Radiat Isot 2023; 202:111057. [PMID: 37782982 DOI: 10.1016/j.apradiso.2023.111057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/20/2023] [Accepted: 09/26/2023] [Indexed: 10/04/2023]
Abstract
The uncertainty component of high efficiency gamma-ray spectrometry measurements due to the uncertainty of the decay parameters is evaluated. It is based on the analysis of a large set of random decay schemes, constructed using the values and uncertainties of the decay parameters taken from data libraries. The distributions of the coincidence-summing correction factors FC, of the factors p⋅FC (p = photon emission intensity), and of the correlations between the distribution of pairs of these factors are constructed and analysed.
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Affiliation(s)
- Octavian Sima
- Physics Department, University of Bucharest, 405 Atomistilor Str, P.O. Box MG-11, Magurele, Ilfov, RO-077125, Romania; National Institute of R&D for Physics and Nuclear Engineering-Horia Hulubei (IFIN-HH), ELI-NP, Bucharest-Magurele, P.O. Box MG-6, RO-077125, Romania.
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2
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Kellett MA, Vio L, Bobin C, Brondeau L, Cardot-Martin M, Isnard H, Lacour D, Lépy MC, Lourenço V, Marie M, Thiam C. Measurement of the absolute gamma-ray emission intensities from the decay of 147Nd. Appl Radiat Isot 2020; 166:109349. [PMID: 32818806 DOI: 10.1016/j.apradiso.2020.109349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 07/06/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
The 2011 Decay Data Evaluation Project (DDEP) evaluation for 147Nd includes recommended absolute emission intensities for the two main gamma-rays at 91.105 (2) keV and 531.016 (22) keV of 0.284 (18) and 0.127 (9) respectively, i.e. with uncertainties of 6.3% and 7.1%. These large uncertainties stem from inconsistencies in the published data and are unfit for modern purposes, since the production of 147Nd is used as an important neutron flux dosimeter. The LNE-LNHB has undertaken new absolute gamma-ray emission intensity measurements. The results of these measurements will be presented, along with a full uncertainty budget, and their effect on the recommended data uncertainties will be discussed.
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Affiliation(s)
- M A Kellett
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France.
| | - L Vio
- CEA, DEN, Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire (LANIE), Bât. 391 PC33, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - C Bobin
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - L Brondeau
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - M Cardot-Martin
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - H Isnard
- CEA, DEN, Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire (LANIE), Bât. 391 PC33, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - D Lacour
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - M-C Lépy
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - V Lourenço
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - M Marie
- CEA, DEN, Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire (LANIE), Bât. 391 PC33, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - C Thiam
- CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
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3
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Coincidence summing corrections factors calculated for volume 152Eu sources in γ-ray spectromtery using Monte Carlo techniques. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07099-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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4
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Experimental validation of corrections factors for γ–γ and γ–X coincidence summing of 133Ba, 152Eu, and 125Sb in volume sources. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06938-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AbstractTrue coincidence summing correction factors for 133Ba, 152Eu and 125Sb were determined experimentally for a small volume source and compared with correction factors obtained with three softwares (EFFTRAN-X, GESPECOR and VGSL). The radionuclides investigated have a relatively challenging decay scheme and their spectra are known to suffer from losses due to summation (γ–γ, γ–X and X–X) when measured at close distances on a HPGe detector sensitive to low energy photons. This study shows that the softwares were in good agreement with each other and the experimental data and the calculated activity was consistent with the activity in the volume source.
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Sima O, De Vismes Ott A, Dias MS, Dryak P, Ferreux L, Gurau D, Hurtado S, Jodlowski P, Karfopoulos K, Koskinas MF, Laubenstein M, Lee YK, Lépy MC, Luca A, Menezes MO, Moreira DS, Nikolič J, Peyres V, Saganowski P, Savva MI, Semmler R, Solc J, Thanh TT, Tyminska K, Tyminski Z, Vidmar T, Vukanac I, Yucel H. Consistency test of coincidence-summing calculation methods for extended sources. Appl Radiat Isot 2019; 155:108921. [PMID: 31629294 DOI: 10.1016/j.apradiso.2019.108921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 08/08/2019] [Accepted: 10/02/2019] [Indexed: 10/25/2022]
Abstract
An internal consistency test of the calculation of coincidence-summing correction factors FC for volume sources is presented. The test is based on exact equations relating the values of FC calculated for three ideal measurement configurations. The test is applied to a number of 33 sets of FC values sent by 21 teams. Most sets passed the test, but not the results obtained using the quasi-point source approximation; in the latter case the test qualitatively indicated the magnitude of the bias of FC.
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Affiliation(s)
- O Sima
- Physics Department, University of Bucharest, Bucharest-Magurele, Romania; Horia Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Bucharest-Magurele, Romania.
| | | | - M S Dias
- Nuclear Metrology Laboratory, Nuclear and Energy Research Institute - IPEN-CNEN/SP, São Paulo, Brazil
| | - P Dryak
- Czech Metrology Institute, Brno, Czech Republic
| | - L Ferreux
- IRSN / PSE-ENV / SAME / LMN, Vésinet, France
| | - D Gurau
- Horia Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Bucharest-Magurele, Romania
| | - S Hurtado
- University of Sevilla, Sevilla, Spain
| | - P Jodlowski
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Cracow, Poland
| | - K Karfopoulos
- Greek Atomic Energy Commission, Environmental Radioactivity Monitoring Department, Athens, Greece
| | - M F Koskinas
- Nuclear Metrology Laboratory, Nuclear and Energy Research Institute - IPEN-CNEN/SP, São Paulo, Brazil
| | - M Laubenstein
- Laboratori Nazionali del Gran Sasso, Istituto Nazionale di Fisica Nucleare, Assergi, Italy
| | - Y K Lee
- DEN/DANS/DM2S/SERMA, CEA-Saclay, France
| | - M C Lépy
- Laboratoire National Henri Becquerel, CEA Saclay, France
| | - A Luca
- Horia Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Bucharest-Magurele, Romania
| | - M O Menezes
- Nuclear Metrology Laboratory, Nuclear and Energy Research Institute - IPEN-CNEN/SP, São Paulo, Brazil
| | - D S Moreira
- Nuclear Metrology Laboratory, Nuclear and Energy Research Institute - IPEN-CNEN/SP, São Paulo, Brazil
| | - J Nikolič
- Laboratory for Radiation Measurements, Department of Radiation and Environmental Protection, Vinča Institute of Nuclear Sciences, Belgrade, Serbia
| | - V Peyres
- Laboratorio de Metrología de Radiaciones Ionizantes, CIEMAT, Madrid, Spain
| | | | - M I Savva
- INRASTES, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - R Semmler
- Nuclear Metrology Laboratory, Nuclear and Energy Research Institute - IPEN-CNEN/SP, São Paulo, Brazil
| | - J Solc
- Czech Metrology Institute, Brno, Czech Republic
| | - T T Thanh
- University of Science, VNU-HCM, Faculty of Physics & Engineering Physics, Department of Nuclear Physics, Ho Chi Minh City, Viet Nam
| | - K Tyminska
- Radioisotope Centre, POLATOM, NCBJ, Poland
| | - Z Tyminski
- Radioisotope Centre, POLATOM, NCBJ, Poland
| | - T Vidmar
- SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400, Mol, Belgium
| | - I Vukanac
- Laboratory for Radiation Measurements, Department of Radiation and Environmental Protection, Vinča Institute of Nuclear Sciences, Belgrade, Serbia
| | - H Yucel
- Ankara University, Institute of Nuclear Sciences, Ankara, Turkey
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6
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Thanh TT, Vuong LQ, Ho PL, Chuong HD, Nguyen VH, Tao CV. Validation of an advanced analytical procedure applied to the measurement of environmental radioactivity. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 184-185:109-113. [PMID: 29407639 DOI: 10.1016/j.jenvrad.2017.12.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 12/26/2017] [Accepted: 12/30/2017] [Indexed: 06/07/2023]
Abstract
In this work, an advanced analytical procedure was applied to calculate radioactivity in spiked water samples in a close geometry gamma spectroscopy. It included MCNP-CP code in order to calculate the coincidence summing correction factor (CSF). The CSF results were validated by a deterministic method using ETNA code for both p-type HPGe detectors. It showed that a good agreement for both codes. Finally, the validity of the developed procedure was confirmed by a proficiency test to calculate the activities of various radionuclides. The results of the radioactivity measurement with both detectors using the advanced analytical procedure were received the ''Accepted'' statuses following the proficiency test.
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Affiliation(s)
- Tran Thien Thanh
- Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Nuclear Technique Laboratory, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam.
| | - Le Quang Vuong
- Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam
| | - Phan Long Ho
- Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Department of Testing, Institute of Public Health in Ho Chi Minh City, 159, Hung Phu Street, District 8, Ho Chi Minh City, Vietnam
| | - Huynh Dinh Chuong
- Nuclear Technique Laboratory, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam
| | - Vo Hoang Nguyen
- Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam
| | - Chau Van Tao
- Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Nuclear Technique Laboratory, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam
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