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González PR, Mendoza-Anaya D, Ávila O, Escobar-Alarcón L. Synthesis, characterization and thermoluminescence properties of MgB 4O 7 phosphor co-doped with Tm and Dy. Appl Radiat Isot 2023; 200:110975. [PMID: 37579690 DOI: 10.1016/j.apradiso.2023.110975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 07/04/2023] [Accepted: 08/08/2023] [Indexed: 08/16/2023]
Abstract
The luminescent and dosimetric properties of the MgB4O7 phosphor co-doped with Tm and Dy ions (MgB4O7:Tm,Dy) obtained by the solution combustion technique were investigated. With the prepared material, sintered dosimeters in pellet form were made. The MgB4O7 dosimeters doped with Tm and Dy with 0.25 and 0.10 mol% respectively and sintered at 1223 K for 3 h showed a sensitivity almost 11 times greater than the sensitivity of the TLD-100 commercial dosimeter. The TL response as a function of the gamma dose showed linearity up to 50 Gy followed by a supralinearity region and, above 500 Gy, the saturation region of the electron traps is reached. The fading of the main TL peak was negligible in the first five days after irradiation reaching 13% after 60 days and the lower detection limit was 43 μGy. The kinetic parameters were determined using the deconvolution method revealing general and second order kinetics. The morphology, crystallography and photoluminescence of the prepared phosphor samples are also reported.
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Affiliation(s)
- P R González
- Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, C.P. 52750, Mexico
| | - D Mendoza-Anaya
- Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, C.P. 52750, Mexico.
| | - O Ávila
- Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, C.P. 52750, Mexico
| | - L Escobar-Alarcón
- Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, C.P. 52750, Mexico
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Ahmad K, Kakakhel MB, Hayat S, Wazir-Ud-Din M, Mahmood MM, Ur-Rehman S, Siddique MT, Munir M, Mirza SM. Dosimetric properties of thermoluminescent NaCl pellets from Khewra Salt Mines, Pakistan. LUMINESCENCE 2022; 37:1701-1709. [PMID: 35864081 DOI: 10.1002/bio.4345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 11/10/2022]
Abstract
Thermoluminescence (TL) and extended dosimetric characteristics of naturally occurring NaCl salt were studied. Pellets were prepared from mined crystalline salt obtained from Khewra salt mines, Pakistan and irradiated from 1 mGy to 10,000 mGy using Co-60 gamma source. The TL response showed two dominant peaks around 125 °C and 230 °C respectively at low doses, with an additional peak in between at doses beyond 300 mGy. A linear and supra-linear TL response was observed between 1 mGy-100 mGy and 100 mGy-10 Gy dose ranges respectively. During first 24 hours post irradiation, the TL intensity dropped by 20%. A maximum angular dependence of up to 50% was observed between 0 to 360°. For photon energies between 33 keV-1.25 MeV significant energy dependence was observed for photons <100 keV only. Sample sensitivity increased with dose a qualitatively similar behaviour to TLD-200. Zeff of the sample (14.6) was comparable to TLD-200 (16.3). No significant dose rate effects (deviation for a Co-60 source within 3.5%) on the TL sensitivity of the sample were found. The lowest detectable dose limit (LDDL) for salt sample was found to be 0.8 mGy whereas the sample reproducibility test showed a maximum of ±11% deviation from the first value.
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Affiliation(s)
- Khalil Ahmad
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan.,Health Physics Division, Pakistan Institute of Nuclear Sciences and Technology (PINSTECH), Islamabad, Pakistan
| | - M Basim Kakakhel
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Sikander Hayat
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - M Wazir-Ud-Din
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - M Masood Mahmood
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan.,Health Physics Division, Pakistan Institute of Nuclear Sciences and Technology (PINSTECH), Islamabad, Pakistan
| | - Shakeel Ur-Rehman
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - M Tariq Siddique
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Munir
- Health Physics Division, Pakistan Institute of Nuclear Sciences and Technology (PINSTECH), Islamabad, Pakistan
| | - Sikander M Mirza
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
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Wahib NB, Abdul Sani SF, Ramli A, Ismail SS, Abdul Jabar MH, Khandaker MU, Daar E, Almugren KS, Alkallas FH, Bradley DA. Natural dead sea salt and retrospective dosimetry. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2020; 59:523-537. [PMID: 32462382 DOI: 10.1007/s00411-020-00846-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
Accidents resulting in widespread dispersal of radioactive materials have given rise to a need for materials that are convenient in allowing individual dose assessment. The present study examines natural Dead Sea salt adopted as a model thermoluminescence dosimetry system. Samples were prepared in two different forms, loose-raw and loose-ground, subsequently exposed to 60Co gamma-rays, delivering doses in the range 2-10 Gy. Key thermoluminescence (TL) properties were examined, including glow curves, dose response, sensitivity, reproducibility and fading. Glow curves shapes were found to be independent of given dose, prominent TL peaks for the raw and ground samples appearing in the temperature ranges 361-385 ºC and 366-401 ºC, respectively. The deconvolution of glow curves has been undertaken using GlowFit, resulting in ten overlapping first-order kinetic glow peaks. For both sample forms, the integrated TL yield displays linearity of response with dose, the loose-raw salt showing some 2.5 × the sensitivity of the ground salt. The samples showed similar degrees of fading, with respective residual signals 28 days post-irradiation of 66% and 62% for the ground and raw forms respectively; conversely, confronted by light-induced fading the respective signal losses were 62% and 80%. The effective atomic number of the Dead Sea salt of 16.3 is comparable to that of TLD-200 (Zeff 16.3), suitable as an environmental radiation monitor in accident situations but requiring careful calibration in the reconstruction of soft tissue dose (soft tissue Zeff 7.2). Sample luminescence studies were carried out via Raman and Photoluminescence spectroscopy as well as X-ray diffraction, ionizing radiation dependent variation in lattice structure being found to influence TL response.
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Affiliation(s)
- Norfadira Binti Wahib
- Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Centre for Biomedical Physics, School of Healthcare and Medical Sciences, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia
| | - S F Abdul Sani
- Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Ain Ramli
- Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - S S Ismail
- Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | | | - M U Khandaker
- Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Centre for Biomedical Physics, School of Healthcare and Medical Sciences, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia
| | - E Daar
- Department of Physics, The University of Jordan, Amman, 11942, Jordan
| | - K S Almugren
- Department of Physics, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - F H Alkallas
- Department of Physics, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - D A Bradley
- Centre for Biomedical Physics, School of Healthcare and Medical Sciences, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia
- Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, UK
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Shahein AY, Hafez HS, Abdou NY. Retrospective dosimetry using Egyptian halite (NaCl). JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2019. [DOI: 10.1080/16878507.2019.1662173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Amany Y. Shahein
- Radiation Protection Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
| | - Hanaa S. Hafez
- Radiation Protection Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
| | - N. Y. Abdou
- Radiation Protection Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
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Majgier R, Biernacka M, Palczewski P, Mandowski A, Polymeris GS. Investigation on thermally assisted optically stimulated luminescence (TA - OSL) signal in various sodium chloride samples. Appl Radiat Isot 2018; 143:98-106. [PMID: 30391717 DOI: 10.1016/j.apradiso.2018.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/11/2018] [Accepted: 10/16/2018] [Indexed: 11/24/2022]
Abstract
Sodium chloride (NaCl) is a phosphor with potential significance in retrospective dosimetry and geological dating. NaCl has been extensively studied for practical use in OSL dosimetry, however, the exact mechanism of the OSL emission is not well explained. This work attempts to extend the information on NaCl luminescent properties by establishing the occurrence of very deep traps in NaCl using the thermally assisted OSL (TA - OSL) method. The studied material was sodium chloride in different forms: halite minerals from Kłodawa salt mine in Poland and NaCl in chemically pure form. The isothermal TA - OSL signal was measured at various temperatures between 25 °C and 280 °C after a prior irradiation and TL erasing of shallow and main traps. The appearance of a strong TA - OSL signal indicates the occurrence of very deep traps in all forms of investigated salt. The temperature dependence of TA - OSL was determined and the activation energy for thermal assistance corresponding to deep traps in NaCl was estimated. For selected temperatures of TA - OSL readout (200 °C and 280 °C) the dose response was examined in wide dose range (1-1000 Gy). Sublinearity was found in different dose range depending on the type of samples.
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Affiliation(s)
- Renata Majgier
- Institute of Physics, Jan Dlugosz University, ul. Armii Krajowej 13/15, 42-202 Częstochowa, Poland.
| | - Magdalena Biernacka
- Institute of Physics, Jan Dlugosz University, ul. Armii Krajowej 13/15, 42-202 Częstochowa, Poland
| | - Piotr Palczewski
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5/7, 87-100 Torun, Poland
| | - Arkadiusz Mandowski
- Institute of Physics, Jan Dlugosz University, ul. Armii Krajowej 13/15, 42-202 Częstochowa, Poland
| | - George S Polymeris
- Institute of Nuclear Sciences, Ankara University, TR-06100 Beşevler, Ankara, Turkey
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