Pub Date : 2024-12-04DOI: 10.1016/j.radphyschem.2024.112429
Vendula Filová, Vladimír Lesay, Josef Holeček, Branislav Vrban, Jakub Lüley, Štefan Čerba, Otto Glavo, Vladimír Nečas
Three methods for the measurement of the radon activity concentration were compared in a series of measurements in the Slovak and Czech Republics. Two methods were based on solid-state nuclear track detectors, TASTRAK (PADC) and RamaRn (LR 115), the third method was based on a semiconductor detector (Airthings Corentium Home). Seven sites were selected for comparison, the measurements were carried out in 21 rooms in total. The comparison shows agreement in the results within the range of uncertainties in the majority of measurements.
{"title":"Interlaboratory comparison of methods for determining radon activity concentration in dwellings in Slovakia and the Czech Republic","authors":"Vendula Filová, Vladimír Lesay, Josef Holeček, Branislav Vrban, Jakub Lüley, Štefan Čerba, Otto Glavo, Vladimír Nečas","doi":"10.1016/j.radphyschem.2024.112429","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112429","url":null,"abstract":"Three methods for the measurement of the radon activity concentration were compared in a series of measurements in the Slovak and Czech Republics. Two methods were based on solid-state nuclear track detectors, TASTRAK (PADC) and RamaRn (LR 115), the third method was based on a semiconductor detector (Airthings Corentium Home). Seven sites were selected for comparison, the measurements were carried out in 21 rooms in total. The comparison shows agreement in the results within the range of uncertainties in the majority of measurements.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"18 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We fabricated 20Li2O–20B2O3–60SiO2 glasses by the melt quenching method and doped Tb with a variety of concentrations from 0.03 to 3.0 %. The Tb-doped glasses showed several sharp emission peaks derived from Tb3+ in the photoluminescence (PL) and the thermally stimulated luminescence (TSL) spectra. The PL quantum yield decreased as the Tb concentration decreased. The PL decay times of the Tb-doped samples were approximately 3.0 ms which was the typical feature of Tb3+. The TSL glow peak was observed at around 75 °C, and the 1.0% Tb-doped sample indicated the highest TSL intensity. The Tb-doped samples worked as a TSL dosimeter in the range of 0.1–1000 mGy X-ray irradiation.
{"title":"Photoluminescence and thermally stimulated luminescence properties of Tb-doped Li2O–B2O3–SiO2 glasses","authors":"Shiyu Rim, Akihiro Nishikawa, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida","doi":"10.1016/j.radphyschem.2024.112449","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112449","url":null,"abstract":"We fabricated 20Li<ce:inf loc=\"post\">2</ce:inf>O–20B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–60SiO<ce:inf loc=\"post\">2</ce:inf> glasses by the melt quenching method and doped Tb with a variety of concentrations from 0.03 to 3.0 %. The Tb-doped glasses showed several sharp emission peaks derived from Tb<ce:sup loc=\"post\">3+</ce:sup> in the photoluminescence (PL) and the thermally stimulated luminescence (TSL) spectra. The PL quantum yield decreased as the Tb concentration decreased. The PL decay times of the Tb-doped samples were approximately 3.0 ms which was the typical feature of Tb<ce:sup loc=\"post\">3+</ce:sup>. The TSL glow peak was observed at around 75 °C, and the 1.0% Tb-doped sample indicated the highest TSL intensity. The Tb-doped samples worked as a TSL dosimeter in the range of 0.1–1000 mGy X-ray irradiation.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"51 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-03DOI: 10.1016/j.radphyschem.2024.112452
Eren Şahiner, Mathieu Duval
{"title":"Editorial - 6th Asia-Pacific Luminescence and Electron Spin Resonance Dating (APLED2022) online conference, 26–28 September 2022","authors":"Eren Şahiner, Mathieu Duval","doi":"10.1016/j.radphyschem.2024.112452","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112452","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"1 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-02DOI: 10.1016/j.radphyschem.2024.112421
Gokcen Tataroglu, Cenap S. Özben
In this work, a low-cost radiation monitoring instrumentation for measuring the environmental gamma radioactivity together with some atmospheric parameters was designed and produced. The device has been built with market available components. The detector section of the device uses a Si-PIN photo-diode as an active element. A tiny current produced from the energy deposition of gamma rays in silicon is amplified in two stages, firstly with a charge sensitive amplifier (CSA) and secondly with a shaping amplifier (SA). The amplified signal is further processed to be converted into digital pulses for counting. The monitor station is designed to be operated remotely in self-sufficient mode, equipped with LoRA module running at 500 MHz to transfer the data remotely to a base station. The base station also includes a LoRA module to receive the data and stores it in an SD card while an OLED display visualizes the recent measurement. Multiple monitor stations can be used to control the radioactivity level in a field simultaneously. This field could be used inside or outside of an interested facility. The noise limit of the detector developed was determined to be as low as 20 keV photon energy. The low-energy detection limit was conservatively set to 40 keV which was still below the 64 keV of the naturally occurring 234Th. Counting the events for hourly, daily or weekly provide statistically significant data depending on the activity of the interested region. All gamma energies above 40 keV from the decays of naturally occurring radioisotopes can be practically observed with this device. The anomalies can be detected using various mathematical algorithms that can be embedded into the microprocessor and the results can be shared with the public.
{"title":"A low-cost instrumentation for monitoring of the environmental radioactivity","authors":"Gokcen Tataroglu, Cenap S. Özben","doi":"10.1016/j.radphyschem.2024.112421","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112421","url":null,"abstract":"In this work, a low-cost radiation monitoring instrumentation for measuring the environmental gamma radioactivity together with some atmospheric parameters was designed and produced. The device has been built with market available components. The detector section of the device uses a Si-PIN photo-diode as an active element. A tiny current produced from the energy deposition of gamma rays in silicon is amplified in two stages, firstly with a charge sensitive amplifier (CSA) and secondly with a shaping amplifier (SA). The amplified signal is further processed to be converted into digital pulses for counting. The monitor station is designed to be operated remotely in self-sufficient mode, equipped with LoRA module running at 500 MHz to transfer the data remotely to a base station. The base station also includes a LoRA module to receive the data and stores it in an SD card while an OLED display visualizes the recent measurement. Multiple monitor stations can be used to control the radioactivity level in a field simultaneously. This field could be used inside or outside of an interested facility. The noise limit of the detector developed was determined to be as low as 20 keV photon energy. The low-energy detection limit was conservatively set to 40 keV which was still below the 64 keV of the naturally occurring <ce:sup loc=\"pre\">234</ce:sup>Th. Counting the events for hourly, daily or weekly provide statistically significant data depending on the activity of the interested region. All gamma energies above 40 keV from the decays of naturally occurring radioisotopes can be practically observed with this device. The anomalies can be detected using various mathematical algorithms that can be embedded into the microprocessor and the results can be shared with the public.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"48 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-02DOI: 10.1016/j.radphyschem.2024.112446
A.M. Abdelmonem
This study investigates the impact of BaO as an additive on various radiation shielding parameters for recycled waste soda-lime silica glass (WSLSG) composites. Experimental gamma-ray attenuation measurements were performed using <ce:sup loc="post">137</ce:sup>Cs and <ce:sup loc="post">60</ce:sup>Co sources and BaO<ce:inf loc="post">(x)</ce:inf> [0.2Bi<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">3</ce:inf>-0.3ZnO-0.2B<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">3</ce:inf>-0.3SLS]<ce:inf loc="post">(1-x)</ce:inf> glass composites (x = 0, 0.01, 0.02, 0.03, 0.04, and 0.05 mol%) with a NaI(Tl) detector. Additionally, theoretical validation of gamma-ray shielding effectiveness was carried out using the EpiXS and Phy-X/PSD programs over a wide gamma-ray energy range (0.015–15 MeV). Key parameters such as mass attenuation coefficient (MAC), half-value layer (HVL), tenth-value layer (TVL), effective atomic number (Z<ce:inf loc="post">eff</ce:inf>), effective electron density (N<ce:inf loc="post">eff</ce:inf>), transmission factor (TF), and gamma-ray dose rate (Dr) were calculated. For a fixed sample thickness and incident gamma-ray energy, the descending order of TF for the glass samples was determined as: <mml:math altimg="si1.svg"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">T</mml:mi><mml:mi mathvariant="bold-italic">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">B</mml:mi><mml:mi mathvariant="bold-italic">a</mml:mi><mml:mi mathvariant="bold-italic">O</mml:mi></mml:mrow><mml:mn mathvariant="bold">1</mml:mn></mml:msub></mml:msub><mml:mo linebreak="goodbreak" linebreakstyle="after">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">T</mml:mi><mml:mi mathvariant="bold-italic">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">B</mml:mi><mml:mi mathvariant="bold-italic">a</mml:mi><mml:mi mathvariant="bold-italic">O</mml:mi></mml:mrow><mml:mn mathvariant="bold">2</mml:mn></mml:msub></mml:msub><mml:mo linebreak="goodbreak" linebreakstyle="after">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">T</mml:mi><mml:mi mathvariant="bold-italic">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">B</mml:mi><mml:mi mathvariant="bold-italic">a</mml:mi><mml:mi mathvariant="bold-italic">O</mml:mi></mml:mrow><mml:mn mathvariant="bold">3</mml:mn></mml:msub></mml:msub><mml:mo linebreak="goodbreak" linebreakstyle="after">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">T</mml:mi><mml:mi mathvariant="bold-italic">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">B</mml:mi><mml:mi mathvariant="bold-italic">a</mml:mi><mml:mi mathvariant="bold-italic">O</mml:mi></mml:mrow><mml:mn mathvariant="bold">4</mml:mn></mml:msub></mml:msub><mml:mo linebreak="goodbreak" linebreakstyle="after">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">T</mml:mi><mml:mi mathvariant="bold-italic">F</mml:mi><
{"title":"Effect of BaO on some radiation shielding parameters of recycling waste soda lime silica glasses system","authors":"A.M. Abdelmonem","doi":"10.1016/j.radphyschem.2024.112446","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112446","url":null,"abstract":"This study investigates the impact of BaO as an additive on various radiation shielding parameters for recycled waste soda-lime silica glass (WSLSG) composites. Experimental gamma-ray attenuation measurements were performed using <ce:sup loc=\"post\">137</ce:sup>Cs and <ce:sup loc=\"post\">60</ce:sup>Co sources and BaO<ce:inf loc=\"post\">(x)</ce:inf> [0.2Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>-0.3ZnO-0.2B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>-0.3SLS]<ce:inf loc=\"post\">(1-x)</ce:inf> glass composites (x = 0, 0.01, 0.02, 0.03, 0.04, and 0.05 mol%) with a NaI(Tl) detector. Additionally, theoretical validation of gamma-ray shielding effectiveness was carried out using the EpiXS and Phy-X/PSD programs over a wide gamma-ray energy range (0.015–15 MeV). Key parameters such as mass attenuation coefficient (MAC), half-value layer (HVL), tenth-value layer (TVL), effective atomic number (Z<ce:inf loc=\"post\">eff</ce:inf>), effective electron density (N<ce:inf loc=\"post\">eff</ce:inf>), transmission factor (TF), and gamma-ray dose rate (Dr) were calculated. For a fixed sample thickness and incident gamma-ray energy, the descending order of TF for the glass samples was determined as: <mml:math altimg=\"si1.svg\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">T</mml:mi><mml:mi mathvariant=\"bold-italic\">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">B</mml:mi><mml:mi mathvariant=\"bold-italic\">a</mml:mi><mml:mi mathvariant=\"bold-italic\">O</mml:mi></mml:mrow><mml:mn mathvariant=\"bold\">1</mml:mn></mml:msub></mml:msub><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">T</mml:mi><mml:mi mathvariant=\"bold-italic\">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">B</mml:mi><mml:mi mathvariant=\"bold-italic\">a</mml:mi><mml:mi mathvariant=\"bold-italic\">O</mml:mi></mml:mrow><mml:mn mathvariant=\"bold\">2</mml:mn></mml:msub></mml:msub><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">T</mml:mi><mml:mi mathvariant=\"bold-italic\">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">B</mml:mi><mml:mi mathvariant=\"bold-italic\">a</mml:mi><mml:mi mathvariant=\"bold-italic\">O</mml:mi></mml:mrow><mml:mn mathvariant=\"bold\">3</mml:mn></mml:msub></mml:msub><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">T</mml:mi><mml:mi mathvariant=\"bold-italic\">F</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">B</mml:mi><mml:mi mathvariant=\"bold-italic\">a</mml:mi><mml:mi mathvariant=\"bold-italic\">O</mml:mi></mml:mrow><mml:mn mathvariant=\"bold\">4</mml:mn></mml:msub></mml:msub><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">></mml:mo><mml:msub><mml:mrow><mml:mi mathvariant=\"bold-italic\">T</mml:mi><mml:mi mathvariant=\"bold-italic\">F</mml:mi><","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"139 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.radphyschem.2024.112445
Adil Alshoaibi, P.O. Ike, Chawki Awada, E.O. Echeweozo, Shumaila Islam, Fabian I. Ezema
Lithium aluminum borate materials was made ready for dosimetric uses in radiation processes. In order to enhance the structural and dosimetric qualities, varying mole concentrations of gadolinium were added to samples of lithium aluminum borate materials. High temperature solid-state technique was used in producing the lithium aluminum borate material. The characterization of the material was archived by using Scanning electron microscope, X-ray diffractometer, thermal gravimetric evaluation, UV–vis–NIR spectrophotometer and thermoluminescence reader/irradiator in other to determine for their structural, thermal analysis, optical properties and dosimetric properties respectively. The kinetic analysis of the major glow peak yielded the activation energy. The crystalline sizes of the undoped and gadolinium-doped Li3Al3(BO3)4 materials were reported to be approximately 36.38 nm and 68.84 nm, respectively, which relies on their matching peaks at a 2θ angle of 25.79o. The grain size for the undoped and gadolinium doped lithium aluminum borate were found within a given range of values 140–160 nm, and 80–100 nm respectively. The optical energy band gap was found within 3.90 eV–4.35 eV for the gadolinium doped while the undoped is 3.00 eV for lithium aluminum borate respectively. A larger energy band gap of lithium aluminum borate was observed after gadolinium was incorporated as dopant. The phosphor of lithium aluminum borate doped with gadolinium was observed to exhibit prominent TL intensity peaks at 100 °C following irradiation. The irradiated samples of lithium aluminum borate doped with gadolinium showed a dose response that was linear between 20 and 150 Gy. This work demonstrates the potential use of Gd-doped lithium aluminum borate phosphor in radiation dosimetry.
{"title":"Gadolinium doped lithium aluminum borate [Li3Al3(BO3)4:Gd] materials synthesized and characterized for its structural, optical and thermoluminescence properties for use in dosimetric application","authors":"Adil Alshoaibi, P.O. Ike, Chawki Awada, E.O. Echeweozo, Shumaila Islam, Fabian I. Ezema","doi":"10.1016/j.radphyschem.2024.112445","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112445","url":null,"abstract":"Lithium aluminum borate materials was made ready for dosimetric uses in radiation processes. In order to enhance the structural and dosimetric qualities, varying mole concentrations of gadolinium were added to samples of lithium aluminum borate materials. High temperature solid-state technique was used in producing the lithium aluminum borate material. The characterization of the material was archived by using Scanning electron microscope, X-ray diffractometer, thermal gravimetric evaluation, UV–vis–NIR spectrophotometer and thermoluminescence reader<ce:bold>/</ce:bold>irradiator in other to determine for their structural, thermal analysis, optical properties and dosimetric properties respectively. The kinetic analysis of the major glow peak yielded the activation energy. The crystalline sizes of the undoped and gadolinium-doped Li<ce:inf loc=\"post\">3</ce:inf>Al<ce:inf loc=\"post\">3</ce:inf>(BO<ce:inf loc=\"post\">3</ce:inf>)<ce:inf loc=\"post\">4</ce:inf> materials were reported to be approximately 36.38 nm and 68.84 nm, respectively, which relies on their matching peaks at a 2θ angle of 25.79<ce:sup loc=\"post\">o</ce:sup>. The grain size for the undoped and gadolinium doped lithium aluminum borate were found within a given range of values 140–160 nm, and 80–100 nm respectively. The optical energy band gap was found within 3.90 eV–4.35 eV for the gadolinium doped while the undoped is 3.00 eV for lithium aluminum borate respectively. A larger energy band gap of lithium aluminum borate was observed after gadolinium was incorporated as dopant. The phosphor of lithium aluminum borate doped with gadolinium was observed to exhibit prominent TL intensity peaks at 100 °C following irradiation. The irradiated samples of lithium aluminum borate doped with gadolinium showed a dose response that was linear between 20 and 150 Gy. This work demonstrates the potential use of Gd-doped lithium aluminum borate phosphor in radiation dosimetry.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"32 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-29DOI: 10.1016/j.radphyschem.2024.112447
Rohit Yadav, Madhumita Bhattacharya, A.K. Bakshi, B.K. Sapra
In this study, Monte Carlo codes FLUKA and GEANT4 were used to assess the angular variation in the response of CaSO4:Dy Teflon disc based TLD badge. These badges were positioned on various ISO phantoms to simulate the angular exposures ranging from 0° to 60° for photons within the energy range of 12.3 keV to 1.25 MeV, as well as for 90Sr/90Y and 106Rh/106Ru beta sources. Plots showing the TL response of the discs in terms of Hp(10), Hp(3), and Hp(0.07) as a function of photon energy were obtained for ISO slab, cylindrical, and pillar phantoms, respectively. Additionally, the study estimated the angular variation in the response of disc ratios (R12 and R32) with respect to both photon and beta energies. The simulation results revealed that the response of the open disc (D3) was higher for lower X-ray energies, attributed to an increase in the photoelectric effect. Conversely, the response of the disc under the metal filter (D1) was observed to increase with the angle, indicating the Compton scattering from the cassette body and phantom, especially at lower X-ray energies. Beta response of both disc D2 (under PMMA filter) and D3 found to be decreasing with the angle of incidence while R32 ratio found to be increasing with the angle of incidence for both 90Sr/90Y and 106Rh/106Ru beta sources. Notably, the simulated results demonstrated good agreement with experimental observations, reinforcing the reliability of the Monte Carlo simulations for complex interactions and responses of TLD badges under different irradiation conditions.
{"title":"Response of CaSO4:Dy Teflon embedded thermoluminescent dosimeter badge on different ISO phantoms for photons and beta sources using FLUKA and GEANT4","authors":"Rohit Yadav, Madhumita Bhattacharya, A.K. Bakshi, B.K. Sapra","doi":"10.1016/j.radphyschem.2024.112447","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112447","url":null,"abstract":"In this study, Monte Carlo codes FLUKA and GEANT4 were used to assess the angular variation in the response of CaSO4:Dy Teflon disc based TLD badge. These badges were positioned on various ISO phantoms to simulate the angular exposures ranging from 0° to 60° for photons within the energy range of 12.3 keV to 1.25 MeV, as well as for <ce:sup loc=\"post\">90</ce:sup>Sr/<ce:sup loc=\"post\">90</ce:sup>Y and <ce:sup loc=\"post\">106</ce:sup>Rh/<ce:sup loc=\"post\">106</ce:sup>Ru beta sources. Plots showing the TL response of the discs in terms of <ce:italic>H</ce:italic><ce:inf loc=\"post\">p</ce:inf>(10), <ce:italic>H</ce:italic><ce:inf loc=\"post\">p</ce:inf>(3), and <ce:italic>H</ce:italic><ce:inf loc=\"post\">p</ce:inf>(0.07) as a function of photon energy were obtained for ISO slab, cylindrical, and pillar phantoms, respectively. Additionally, the study estimated the angular variation in the response of disc ratios (R12 and R32) with respect to both photon and beta energies. The simulation results revealed that the response of the open disc (D3) was higher for lower X-ray energies, attributed to an increase in the photoelectric effect. Conversely, the response of the disc under the metal filter (D1) was observed to increase with the angle, indicating the Compton scattering from the cassette body and phantom, especially at lower X-ray energies. Beta response of both disc D2 (under PMMA filter) and D3 found to be decreasing with the angle of incidence while R32 ratio found to be increasing with the angle of incidence for both <ce:sup loc=\"post\">90</ce:sup>Sr/<ce:sup loc=\"post\">90</ce:sup>Y and <ce:sup loc=\"post\">106</ce:sup>Rh/<ce:sup loc=\"post\">106</ce:sup>Ru beta sources. Notably, the simulated results demonstrated good agreement with experimental observations, reinforcing the reliability of the Monte Carlo simulations for complex interactions and responses of TLD badges under different irradiation conditions.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"88 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-29DOI: 10.1016/j.radphyschem.2024.112438
Nourhan M. Elsoudy , Maha Anwar , Hanan Hussien , Hossam Mahmoud Yassien , Lamiaa Mahmoud Abdelazeez
Whole-body fluorodeoxyglucose F18 (18F-FDG) is the most common radiopharmaceutical use in PET/CT imaging for cancer staging. Although radiopharmaceutical for PET/CT examination has been acknowledged for its safety and efficacy, the internal dosimetry and effective dose (ED) from the examinations are rarely discussed. Hence, this study aimed to evaluate radiation ED and influencing factors of 18F-FDG PET/CT in breast cancer and lymphoma patients. The findings contribute to refining imaging protocols, optimizing radiation exposure, and enhancing the clinical utility of PET/CT in cancer diagnostics and monitoring. Significant correlations were observed between PET effective dose and physiological factors such as age, weight, blood glucose level (BLG), and injected dose, particularly in NHL patients, with a strong negative correlation between PET effective dose and tumor-to-liver ratio (TLR). Based on our results, we recommend excluding patients with blood glucose levels below 80 mg/dL from PET/CT protocols. Additionally, to minimize CT effective doses and adhere to the ALARA principle, reducing tube-current modulation is advised, as it significantly impacts DLP values and the overall effective dose in PET/CT procedures.
{"title":"Effect of some physiological and technical factors on Effective Dose Estimation of Patients Administered with 18F-FDG in PET/CT","authors":"Nourhan M. Elsoudy , Maha Anwar , Hanan Hussien , Hossam Mahmoud Yassien , Lamiaa Mahmoud Abdelazeez","doi":"10.1016/j.radphyschem.2024.112438","DOIUrl":"10.1016/j.radphyschem.2024.112438","url":null,"abstract":"<div><div>Whole-body fluorodeoxyglucose F18 (<sup>18</sup>F-FDG) is the most common radiopharmaceutical use in PET/CT imaging for cancer staging. Although radiopharmaceutical for PET/CT examination has been acknowledged for its safety and efficacy, the internal dosimetry and effective dose (ED) from the examinations are rarely discussed. Hence, this study aimed to evaluate radiation ED and influencing factors of <sup>18</sup>F-FDG PET/CT in breast cancer and lymphoma patients. The findings contribute to refining imaging protocols, optimizing radiation exposure, and enhancing the clinical utility of PET/CT in cancer diagnostics and monitoring. Significant correlations were observed between PET effective dose and physiological factors such as age, weight, blood glucose level (BLG), and injected dose, particularly in NHL patients, with a strong negative correlation between PET effective dose and tumor-to-liver ratio (TLR). Based on our results, we recommend excluding patients with blood glucose levels below 80 mg/dL from PET/CT protocols. Additionally, to minimize CT effective doses and adhere to the ALARA principle, reducing tube-current modulation is advised, as it significantly impacts DLP values and the overall effective dose in PET/CT procedures.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112438"},"PeriodicalIF":2.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-29DOI: 10.1016/j.radphyschem.2024.112443
Morad Kh Hamad, M.I. Sayyed, M.H.A. Mhareb, M. Elsafi, Mohamed Y. Hanfi, M.A. Mahdi, Mayeen Uddin Khandaker
In this work, the melt-quenching process was employed to prepare a new series of B2O3–BaO–Na2O–ZnO–CaO glass systems to explore their radiation-shielding properties. The samples studied were given the following code: G1, G2, G3 and G4. The effect of BaO and ZnO on the ability of the produced glasses to attenuate radiation was studied. The addition of ZnO and BaO led to enhanced glass density. For example, the density of G1, G2, G3, and G4 is 3.017, 3.152, 3.287, and 3.422 g/cm3, respectively. The Phy-X program was employed to study the radiation shielding properties of the glasses in the energy range of 0.122–0.678 MeV, emitted from the Eu-152 radioactive source. According to the results, the glass sample with a composition 52B2O3–11BaO–8Na2O–16ZnO–13CaO (G4) had a higher linear attenuation coefficient (LAC) than the other glasses. For example, the LAC at 0.1218 MeV for G1, G2, G3, and G4 samples is 0.821, 0.996, 1.176, and 1.362 cm−1, respectively. Also, this glass sample possesses a high Zeff due to the high amount of BaO and ZnO. The Zeff values at 0.1218 MeV are 14.217, 16.651, 19.017, and 21.318 for G1, G2, G3, and G4, respectively. The glass sample with the composition of 70B2O3–5BaO–5Na2O–10ZnO–10CaO (G1) has the highest half-value layer (HVL) and mean free path (MFP) among the prepared glasses, meaning the lowest shielding ability compared to other samples. Based on the results, the G4 sample showed the highest shielding properties, making it suitable as a radiation-shielding substance.
{"title":"Effectiveness of barium oxide and zinc oxide in borate-based glasses for gamma radiation shielding","authors":"Morad Kh Hamad, M.I. Sayyed, M.H.A. Mhareb, M. Elsafi, Mohamed Y. Hanfi, M.A. Mahdi, Mayeen Uddin Khandaker","doi":"10.1016/j.radphyschem.2024.112443","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112443","url":null,"abstract":"In this work, the melt-quenching process was employed to prepare a new series of B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–BaO–Na<ce:inf loc=\"post\">2</ce:inf>O–ZnO–CaO glass systems to explore their radiation-shielding properties. The samples studied were given the following code: G1, G2, G3 and G4. The effect of BaO and ZnO on the ability of the produced glasses to attenuate radiation was studied. The addition of ZnO and BaO led to enhanced glass density. For example, the density of G1, G2, G3, and G4 is 3.017, 3.152, 3.287, and 3.422 g/cm<ce:sup loc=\"post\">3</ce:sup>, respectively. The Phy-X program was employed to study the radiation shielding properties of the glasses in the energy range of 0.122–0.678 MeV, emitted from the Eu-152 radioactive source. According to the results, the glass sample with a composition 52B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–11BaO–8Na<ce:inf loc=\"post\">2</ce:inf>O–16ZnO–13CaO (G4) had a higher linear attenuation coefficient (LAC) than the other glasses. For example, the LAC at 0.1218 MeV for G1, G2, G3, and G4 samples is 0.821, 0.996, 1.176, and 1.362 cm<ce:sup loc=\"post\">−1</ce:sup>, respectively. Also, this glass sample possesses a high Z<ce:inf loc=\"post\">eff</ce:inf> due to the high amount of BaO and ZnO. The Z<ce:inf loc=\"post\">eff</ce:inf> values at 0.1218 MeV are 14.217, 16.651, 19.017, and 21.318 for G1, G2, G3, and G4, respectively. The glass sample with the composition of 70B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–5BaO–5Na<ce:inf loc=\"post\">2</ce:inf>O–10ZnO–10CaO (G1) has the highest half-value layer (HVL) and mean free path (MFP) among the prepared glasses, meaning the lowest shielding ability compared to other samples. Based on the results, the G4 sample showed the highest shielding properties, making it suitable as a radiation-shielding substance.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"5 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-28DOI: 10.1016/j.radphyschem.2024.112420
Vinícius S.M. de Barros , Alcilene C. da Silva , Boisguillebert P.A.G. da Nobrega , Charles N.P. Oliveira , Viviane K. Asfora , Lucas M.F. Amorim , Pedro L. Guzzo , Helen J. Khoury
Rare earth doped magnesium tetraborate (MgB4O7) has gained significant attention in the last decade as a prominent dosimetry material in thermally stimulated luminescence (TL) and, more recently, as a potential optically stimulated luminescent dosimeter. This report aims to provide a comprehensive review of the state of the art in doped MgB4O7 and to analyze the lessons learned from over 50 years of material development to assist the younger researchers in the field of materials for ionizing radiation dosimetry. An overview of the dosimeter properties when different dopants and charge compensators is described.
{"title":"Luminescent dosimetry materials: A review on doped-magnesium tetraborate","authors":"Vinícius S.M. de Barros , Alcilene C. da Silva , Boisguillebert P.A.G. da Nobrega , Charles N.P. Oliveira , Viviane K. Asfora , Lucas M.F. Amorim , Pedro L. Guzzo , Helen J. Khoury","doi":"10.1016/j.radphyschem.2024.112420","DOIUrl":"10.1016/j.radphyschem.2024.112420","url":null,"abstract":"<div><div>Rare earth doped magnesium tetraborate (MgB<sub>4</sub>O<sub>7</sub>) has gained significant attention in the last decade as a prominent dosimetry material in thermally stimulated luminescence (TL) and, more recently, as a potential optically stimulated luminescent dosimeter. This report aims to provide a comprehensive review of the state of the art in doped MgB<sub>4</sub>O<sub>7</sub> and to analyze the lessons learned from over 50 years of material development to assist the younger researchers in the field of materials for ionizing radiation dosimetry. An overview of the dosimeter properties when different dopants and charge compensators is described.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112420"},"PeriodicalIF":2.8,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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