A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation
In this work, an absolute method to calibrate an α-spectrometer is proposed taking into account the Source-to-Detector, and lateral distances due to eccentric source distribution. An analytical formula to calibrate an α-spectrometer is derived and the Simpson's integration method was utilized t...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024045298 |
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| author | K.M. El-Kourghly W. El-Gammal Mohamed M. Damoom Abdulsalam M. Alhawsawi M. Abdelati H.I. Khedr R. Abouzaid |
| author_facet | K.M. El-Kourghly W. El-Gammal Mohamed M. Damoom Abdulsalam M. Alhawsawi M. Abdelati H.I. Khedr R. Abouzaid |
| author_sort | K.M. El-Kourghly |
| collection | DOAJ |
| description | In this work, an absolute method to calibrate an α-spectrometer is proposed taking into account the Source-to-Detector, and lateral distances due to eccentric source distribution. An analytical formula to calibrate an α-spectrometer is derived and the Simpson's integration method was utilized to solve these equations in its integral form numerically using a written C computer code. The general Monte Carlo N-particle code, MCNP as well as experimental measurements for some standard α-emitters are used to benchmark the proposed method. An agreement was found between the efficiency results calculated by MC and the proposed method with a maximum relative difference of about 0.5%. While, experimental measurement of α-emitters activity employing the proposed method differs by about 1.65% from the certified values. Accounting for the man made error allows to accurately quantify the assayed sample. Therefore, the inaccuracy in the efficiency results due to non-accurate inputs pertained to the source, and detector radii, Source–Detector distances, and eccentric source distribution are investigated in the Source-to-Detector distance range of (4 to 44 mm). The results show that a difference of ±1% in the detector radius, and Source-to-Detector distance than the normal values yields a relative difference of about ±2%, while a difference of ±50% in the source radius or source lateral distance from detector symmetry axis could only yields inaccuracy of less than ±3% in the efficiency results. |
| first_indexed | 2024-04-24T16:49:50Z |
| format | Article |
| id | doaj.art-aff0327b60354c47962997b3fcbe1d6a |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-24T16:49:50Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-aff0327b60354c47962997b3fcbe1d6a2024-03-29T05:50:41ZengElsevierHeliyon2405-84402024-04-01107e28498A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculationK.M. El-Kourghly0W. El-Gammal1Mohamed M. Damoom2Abdulsalam M. Alhawsawi3M. Abdelati4H.I. Khedr5R. Abouzaid6Nuclear Safeguards and Physical Protection Department, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt; Corresponding author.Nuclear Safeguards and Physical Protection Department, Egyptian Atomic Energy Authority (EAEA), Cairo, EgyptNuclear Engineering Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Center for Training & Radiation Protection, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Corresponding author.Nuclear Engineering Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Center for Training & Radiation Protection, King Abdulaziz University, Jeddah, 21589, Saudi ArabiaNuclear Safeguards and Physical Protection Department, Egyptian Atomic Energy Authority (EAEA), Cairo, EgyptNuclear Safeguards and Physical Protection Department, Egyptian Atomic Energy Authority (EAEA), Cairo, EgyptFuel Cycle Safety Department, Egyptian Atomic Energy Authority (EAEA), Cairo, EgyptIn this work, an absolute method to calibrate an α-spectrometer is proposed taking into account the Source-to-Detector, and lateral distances due to eccentric source distribution. An analytical formula to calibrate an α-spectrometer is derived and the Simpson's integration method was utilized to solve these equations in its integral form numerically using a written C computer code. The general Monte Carlo N-particle code, MCNP as well as experimental measurements for some standard α-emitters are used to benchmark the proposed method. An agreement was found between the efficiency results calculated by MC and the proposed method with a maximum relative difference of about 0.5%. While, experimental measurement of α-emitters activity employing the proposed method differs by about 1.65% from the certified values. Accounting for the man made error allows to accurately quantify the assayed sample. Therefore, the inaccuracy in the efficiency results due to non-accurate inputs pertained to the source, and detector radii, Source–Detector distances, and eccentric source distribution are investigated in the Source-to-Detector distance range of (4 to 44 mm). The results show that a difference of ±1% in the detector radius, and Source-to-Detector distance than the normal values yields a relative difference of about ±2%, while a difference of ±50% in the source radius or source lateral distance from detector symmetry axis could only yields inaccuracy of less than ±3% in the efficiency results.http://www.sciencedirect.com/science/article/pii/S2405844024045298Alpha spectrometersAbsolute methodAnalytical-numericalMCNPSolid angle |
| spellingShingle | K.M. El-Kourghly W. El-Gammal Mohamed M. Damoom Abdulsalam M. Alhawsawi M. Abdelati H.I. Khedr R. Abouzaid A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation Heliyon Alpha spectrometers Absolute method Analytical-numerical MCNP Solid angle |
| title | A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation |
| title_full | A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation |
| title_fullStr | A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation |
| title_full_unstemmed | A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation |
| title_short | A proposed numerical method for absolute efficiency calibration of α-spectrometers and its application for activity calculation |
| title_sort | proposed numerical method for absolute efficiency calibration of α spectrometers and its application for activity calculation |
| topic | Alpha spectrometers Absolute method Analytical-numerical MCNP Solid angle |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024045298 |
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