Pub Date : 2024-10-30DOI: 10.1016/j.radphyschem.2024.112357
A. Paul Dhinakaran, P. Vinothkumar, S. Praveenkumar, Manoj Mohapatra
This study aims to investigate the structural, optical, and mechanical properties of Ce3+ doped Barium Tin Borophosphate glass for potential applications in nuclear radiation shielding. The Ce3+ Doped Barium Tin Borophosphate glass (50B2O3+20 P2O5+10TiO2+6SrCO3+4SnO+ 4BaF2+5BaCO3+1Ce2O3) was produced according to earlier research, melt quenching method. The amorphous nature of Ce3+ Doped Barium Tin Borophosphate glass was verified by powder X-ray diffraction investigation. The Ce3+ Doped Barium Tin Borophosphate glass's functional groups were determined using Fourier transform-RAMAN and Fourier transform infrared spectroscopy. Using Ultraviolet-Visible spectroscopy the Ce3+ Doped Barium Tin Borophosphate glass was examined. These properties included its optical band gap, extinction coefficient, optical conductivity, and refractive index. Using EDAX and SEM analyses, the chemical compositions and surface morphology of the Ce3+ Doped Barium Tin Borophosphate glass were examined. Ce3+ doped barium tin Borophosphate glass was studied in terms of its excitation and emission spectra using the photoluminescence technique. The glass's CIE coordinates were also looked at. Additionally, the mass attenuation coefficient, half-value layer, mean free path, tenth value layer, and EABF were studied concerning the glass's gamma-ray shielding qualities using the Phy-X software.
{"title":"The effect of Ce3+ ions on the optical, and radiation shielding properties in Ba–Sn borophosphate glass","authors":"A. Paul Dhinakaran, P. Vinothkumar, S. Praveenkumar, Manoj Mohapatra","doi":"10.1016/j.radphyschem.2024.112357","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112357","url":null,"abstract":"This study aims to investigate the structural, optical, and mechanical properties of Ce<ce:sup loc=\"post\">3+</ce:sup> doped Barium Tin Borophosphate glass for potential applications in nuclear radiation shielding. The Ce<ce:sup loc=\"post\">3+</ce:sup> Doped Barium Tin Borophosphate glass (50B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>+20 P<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">5</ce:inf>+10TiO<ce:inf loc=\"post\">2</ce:inf>+6SrCO<ce:inf loc=\"post\">3</ce:inf>+4SnO+ 4BaF<ce:inf loc=\"post\">2</ce:inf>+5BaCO<ce:inf loc=\"post\">3</ce:inf>+1Ce<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>) was produced according to earlier research, melt quenching method. The amorphous nature of Ce<ce:sup loc=\"post\">3+</ce:sup> Doped Barium Tin Borophosphate glass was verified by powder X-ray diffraction investigation. The Ce<ce:sup loc=\"post\">3+</ce:sup> Doped Barium Tin Borophosphate glass's functional groups were determined using Fourier transform-RAMAN and Fourier transform infrared spectroscopy. Using Ultraviolet-Visible spectroscopy the Ce<ce:sup loc=\"post\">3+</ce:sup> Doped Barium Tin Borophosphate glass was examined. These properties included its optical band gap, extinction coefficient, optical conductivity, and refractive index. Using EDAX and SEM analyses, the chemical compositions and surface morphology of the Ce<ce:sup loc=\"post\">3+</ce:sup> Doped Barium Tin Borophosphate glass were examined. Ce<ce:sup loc=\"post\">3+</ce:sup> doped barium tin Borophosphate glass was studied in terms of its excitation and emission spectra using the photoluminescence technique. The glass's CIE coordinates were also looked at. Additionally, the mass attenuation coefficient, half-value layer, mean free path, tenth value layer, and EABF were studied concerning the glass's gamma-ray shielding qualities using the Phy-X software.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"70 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665599","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 : 2024-10-30DOI: 10.1016/j.radphyschem.2024.112358
Tushar Kanti Das, Sudip Karmakar, Rajib Mondal, Aparna Datta, Abhijit Saha
Many biomedical applications can greatly benefit from the combination of photoluminescence and magnetic properties of non-toxic manganese-based nanomaterials and thus, it demands for synthesizing such materials in an aqueous environment. The present work reports aqueous synthesis of starch-capped manganese selenide (MnSe) nanoparticles (NPs) through a steady-state gamma irradiation route under ambient pressure and room temperature. As radiolysis is considered as the cleanest method among available chemical approaches, we preferred to employ this technique and endeavored to establish optimal conditions of such synthesis. The as-produced MnSe nanocrystals demonstrated strong photoluminescence with a quantum yield of ca. 32% and co-existence of paramagnetic with antiferromagnetic behavior. To look into possible light-induced reactions with aromatic molecules, the effectiveness of synthesized particles on photo-induced degradation of dyes of similar structure was investigated. The proposed strategy may pave the way for synthesizing magneto-fluorescent nanoparticles in aqueous medium, which may find immense scope in nano-photonics and nano-biotechnology including biological assays, labelling and imaging.
{"title":"Radiation driven synthesis of MnSe nanoparticles with dual luminescence and magnetic characteristics and its role in photocatalytic reactions","authors":"Tushar Kanti Das, Sudip Karmakar, Rajib Mondal, Aparna Datta, Abhijit Saha","doi":"10.1016/j.radphyschem.2024.112358","DOIUrl":"10.1016/j.radphyschem.2024.112358","url":null,"abstract":"<div><div>Many biomedical applications can greatly benefit from the combination of photoluminescence and magnetic properties of non-toxic manganese-based nanomaterials and thus, it demands for synthesizing such materials in an aqueous environment. The present work reports aqueous synthesis of starch-capped manganese selenide (MnSe) nanoparticles (NPs) through a steady-state gamma irradiation route under ambient pressure and room temperature. As radiolysis is considered as the cleanest method among available chemical approaches, we preferred to employ this technique and endeavored to establish optimal conditions of such synthesis. The as-produced MnSe nanocrystals demonstrated strong photoluminescence with a quantum yield of ca. 32% and co-existence of paramagnetic with antiferromagnetic behavior. To look into possible light-induced reactions with aromatic molecules, the effectiveness of synthesized particles on photo-induced degradation of dyes of similar structure was investigated. The proposed strategy may pave the way for synthesizing magneto-fluorescent nanoparticles in aqueous medium, which may find immense scope in nano-photonics and nano-biotechnology including biological assays, labelling and imaging.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112358"},"PeriodicalIF":2.8,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592683","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 : 2024-10-30DOI: 10.1016/j.radphyschem.2024.112353
Khizar Hayat Satti, Muhammad Tariq Siddique, Shakeel Ur Rehman, Muhammad Dilband
This study is aimed to estimate the skin dose due to presence of natural radionuclides in the Multani Mitti (MM, fuller's earth). The activity concentration of natural radionuclides is measured by using Canberra's HPGe detector model GC3020. The average activity concentration levels of 238U, 232Th and 40K are found to be 47, 71 and 748 Bq kg−1 respectively which are higher than corresponding world's median values 30, 35 and 400 Bq kg−1 as reported in Unscear 2000. Geant4 MC simulation is used to estimate skin doses arising due to application of MM on the skin. The decay chains for 238U and 232Th are simulated using Radioactive Decay Module (RDM) available in the Geant4, which automatically accounts for the all members of the decay chain and all types of radioactive emissions. The skin dose conversion factors for natural radionuclides in MM for 238U,232Th and 40K are found to be 0.5, 0.5 and 330 mGy MBq−1 hr−1. The main contribution to skin dose comes from 40K. The radiological health risks to miners and workers are evaluated by measuring radium equivalent activity, radiation hazard indices, annual absorbed dose rate, annual gonadal effective dose equivalent and annual effective dose equivalent. The values of annual absorbed dose rate, gonadal dose and annual effective dose equivalent are found higher than world's median values in the soil. Therefore, miners and workers dealing with MM are vulnerable to potential negative health effects of radiation exposure.
{"title":"Skin dose estimation of Multani Mitti (Fuller's earth) using Geant4 Monte Carlo simulations","authors":"Khizar Hayat Satti, Muhammad Tariq Siddique, Shakeel Ur Rehman, Muhammad Dilband","doi":"10.1016/j.radphyschem.2024.112353","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112353","url":null,"abstract":"This study is aimed to estimate the skin dose due to presence of natural radionuclides in the Multani Mitti (MM, fuller's earth). The activity concentration of natural radionuclides is measured by using Canberra's HPGe detector model GC3020. The average activity concentration levels of <ce:sup loc=\"post\">238</ce:sup>U, <ce:sup loc=\"post\">232</ce:sup>Th and <ce:sup loc=\"post\">40</ce:sup>K are found to be 47, 71 and 748 Bq kg<ce:sup loc=\"post\">−1</ce:sup> respectively which are higher than corresponding world's median values 30, 35 and 400 Bq kg<ce:sup loc=\"post\">−1</ce:sup> as reported in Unscear 2000. Geant4 MC simulation is used to estimate skin doses arising due to application of MM on the skin. The decay chains for <ce:sup loc=\"post\">238</ce:sup>U and <ce:sup loc=\"post\">232</ce:sup>Th are simulated using Radioactive Decay Module (RDM) available in the Geant4, which automatically accounts for the all members of the decay chain and all types of radioactive emissions. The skin dose conversion factors for natural radionuclides in MM for <ce:sup loc=\"post\">238</ce:sup>U,<ce:sup loc=\"post\">232</ce:sup>Th and <ce:sup loc=\"post\">40</ce:sup>K are found to be 0.5, 0.5 and 330 mGy MBq<ce:sup loc=\"post\">−1</ce:sup> hr<ce:sup loc=\"post\">−1</ce:sup>. The main contribution to skin dose comes from <ce:sup loc=\"post\">40</ce:sup>K. The radiological health risks to miners and workers are evaluated by measuring radium equivalent activity, radiation hazard indices, annual absorbed dose rate, annual gonadal effective dose equivalent and annual effective dose equivalent. The values of annual absorbed dose rate, gonadal dose and annual effective dose equivalent are found higher than world's median values in the soil. Therefore, miners and workers dealing with MM are vulnerable to potential negative health effects of radiation exposure.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"62 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665602","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 : 2024-10-30DOI: 10.1016/j.radphyschem.2024.112355
Suleman M. Ngaram, Suhairul Hashim, Mohamad Syazwan Mohd Sanusi, Abdullahi Ibrahim
Boro-tellurite glasses in the (70-x) B2O3–5TeO2–10Bi2O3–10SrCO3–5K2CO3-xWO3 system, with varying WO3 content (x = 0, 1, 2, 3, 4 and 5 mol %), were synthesized using the melt quenching technique. The effectiveness of radiation protection was assessed using the Phy-X/PSD tool across a broad energy spectrum ranging from 15 keV to 15 MeV. The results indicated that the mass attenuation coefficient (MAC) values increased proportionally with the concentration of WO₃ in the glass samples. At approximately 0.015 MeV, the MAC reached its maximum for all glass compositions, ranging from 45.822 g cm−2 for BW1 to 51.258 g cm−2 for BW5. However, beyond 15 keV, a notable decrease in MAC values was observed, primarily attributed to the dominance of photoelectric interactions at lower energy levels. Furthermore, the effective atomic number (Zeff) ranged from 64.08 to 65.44, with a peak observed at 15 keV. Beyond this energy, the Zeff values for all the produced glass samples showed a marked decrease as the energy of gamma photons increased, mirroring the trend observed in the MAC values. Conversely, the half-value layer (HVL) and mean free path (MFP) exhibited a consistent reduction. A comparative analysis of the MFP of the glass samples with other shielding materials demonstrated that the BW5 glass exhibited superior performance at 1.50 MeV. These findings highlight the potential of the BW5 glass sample for radiation shielding applications, which has the highest WO₃ content and density, positioning it as a promising material for future radiation protection technologies.
{"title":"Enhanced physical, optical and radiation shielding properties of tungsten modified potassium boro-tellurite glass systems: Theoretical approach","authors":"Suleman M. Ngaram, Suhairul Hashim, Mohamad Syazwan Mohd Sanusi, Abdullahi Ibrahim","doi":"10.1016/j.radphyschem.2024.112355","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112355","url":null,"abstract":"Boro-tellurite glasses in the (70-x) B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–5TeO<ce:inf loc=\"post\">2</ce:inf>–10Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–10SrCO<ce:inf loc=\"post\">3</ce:inf>–5K<ce:inf loc=\"post\">2</ce:inf>CO<ce:inf loc=\"post\">3</ce:inf>-xWO<ce:inf loc=\"post\">3</ce:inf> system, with varying WO<ce:inf loc=\"post\">3</ce:inf> content (x = 0, 1, 2, 3, 4 and 5 mol %), were synthesized using the melt quenching technique. The effectiveness of radiation protection was assessed using the Phy-X/PSD tool across a broad energy spectrum ranging from 15 keV to 15 MeV. The results indicated that the mass attenuation coefficient (MAC) values increased proportionally with the concentration of WO₃ in the glass samples. At approximately 0.015 MeV, the MAC reached its maximum for all glass compositions, ranging from 45.822 g cm<ce:sup loc=\"post\">−2</ce:sup> for BW1 to 51.258 g cm<ce:sup loc=\"post\">−2</ce:sup> for BW5. However, beyond 15 keV, a notable decrease in MAC values was observed, primarily attributed to the dominance of photoelectric interactions at lower energy levels. Furthermore, the effective atomic number (Z<ce:inf loc=\"post\">eff</ce:inf>) ranged from 64.08 to 65.44, with a peak observed at 15 keV. Beyond this energy, the Z<ce:inf loc=\"post\">eff</ce:inf> values for all the produced glass samples showed a marked decrease as the energy of gamma photons increased, mirroring the trend observed in the MAC values. Conversely, the half-value layer (HVL) and mean free path (MFP) exhibited a consistent reduction. A comparative analysis of the MFP of the glass samples with other shielding materials demonstrated that the BW5 glass exhibited superior performance at 1.50 MeV. These findings highlight the potential of the BW5 glass sample for radiation shielding applications, which has the highest WO₃ content and density, positioning it as a promising material for future radiation protection technologies.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"13 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665601","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 : 2024-10-30DOI: 10.1016/j.radphyschem.2024.112354
Johnpaul Mbagwu
<div><h3>Background</h3><div>Accurate measurement of linear energy transfer (LET) is crucial in medical physics, particularly for proton therapy dosimetry. High atomic-number (<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span>) materials such as BaFBr and low-<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span> materials such as <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span> and water are commonly used in dosimeters.</div></div><div><h3>Purpose</h3><div>To evaluate the feasibility and accuracy of the use of various dosimetry materials (water, air, <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>, aluminum (Al), BaFBr, and oxygen) for measuring LET by comparing their stopping power (ratios) via the Bethe-Bloch theory and semiempirical models.</div></div><div><h3>Methods</h3><div>Stopping power ratios were calculated via the PSTAR database for proton energies ranging from 0.01 MeV to 10,000 MeV. The Bethe-Bloch theory with density and shell corrections was used for high-energy protons, whereas a semiempirical model was applied for low-energy protons. Calculations validation involved comparing the computed stopping powers SRIM-2008 and PSTAR for materials such as water, aluminum, air, <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>, BaFBr, and oxygen.</div></div><div><h3>Results</h3><div>The stopping power water-to-air ratio remains stable, while the <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>-to-water and air-to-water ratios highlight their differing attenuation properties. The BaFBr-to-water ratio shows significant material-dependent differences, and the water-to-<span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span> ratio is particularly relevant for proton therapy dosimetry calculations in medical physics. These results demonstrate consistency across materials but do not inherently confirm the accuracy of LET measurements. However, a comparison of theoretical models with computed stopping powers SRIM-2008 and PSTAR showed strong agreement, particularly for high-energy protons where the Bethe-Bloch theory was applied, suggesting that the models reliably predict stopping power at these energy levels.</div></div><div><h3>Conclusions</h3><div>This study confirms the feasibility of using high-<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span> materials such as BaFBr and low-<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span> materials such as
{"title":"Theoretical investigation of dosimeter accuracy for linear energy transfer measurements in proton therapy: A comparative study of stopping power ratios","authors":"Johnpaul Mbagwu","doi":"10.1016/j.radphyschem.2024.112354","DOIUrl":"10.1016/j.radphyschem.2024.112354","url":null,"abstract":"<div><h3>Background</h3><div>Accurate measurement of linear energy transfer (LET) is crucial in medical physics, particularly for proton therapy dosimetry. High atomic-number (<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span>) materials such as BaFBr and low-<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span> materials such as <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span> and water are commonly used in dosimeters.</div></div><div><h3>Purpose</h3><div>To evaluate the feasibility and accuracy of the use of various dosimetry materials (water, air, <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>, aluminum (Al), BaFBr, and oxygen) for measuring LET by comparing their stopping power (ratios) via the Bethe-Bloch theory and semiempirical models.</div></div><div><h3>Methods</h3><div>Stopping power ratios were calculated via the PSTAR database for proton energies ranging from 0.01 MeV to 10,000 MeV. The Bethe-Bloch theory with density and shell corrections was used for high-energy protons, whereas a semiempirical model was applied for low-energy protons. Calculations validation involved comparing the computed stopping powers SRIM-2008 and PSTAR for materials such as water, aluminum, air, <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>, BaFBr, and oxygen.</div></div><div><h3>Results</h3><div>The stopping power water-to-air ratio remains stable, while the <span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>-to-water and air-to-water ratios highlight their differing attenuation properties. The BaFBr-to-water ratio shows significant material-dependent differences, and the water-to-<span><math><mrow><msub><mrow><mi>A</mi><mi>l</mi></mrow><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span> ratio is particularly relevant for proton therapy dosimetry calculations in medical physics. These results demonstrate consistency across materials but do not inherently confirm the accuracy of LET measurements. However, a comparison of theoretical models with computed stopping powers SRIM-2008 and PSTAR showed strong agreement, particularly for high-energy protons where the Bethe-Bloch theory was applied, suggesting that the models reliably predict stopping power at these energy levels.</div></div><div><h3>Conclusions</h3><div>This study confirms the feasibility of using high-<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span> materials such as BaFBr and low-<span><math><mrow><msub><mi>Z</mi><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></mrow></math></span> materials such as ","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112354"},"PeriodicalIF":2.8,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.radphyschem.2024.112342
Batool A. Abu Saleh, Amani Kraishan, Ziad M. Elimat, Islam Abu Karaki, Ruba I. Alzubi, Hassan K. Juwhari
This study explores the influence of gamma radiation on the optical properties of PMMA composites doped with aluminum (Al) at varying concentrations. The composites were irradiated with gamma doses of 50, 100, and 200 Gy, and their optical responses were systematically analyzed using UV–Vis spectroscopy. The results reveal a pronounced dependence of both the absorption coefficient and optical band gap on the Al doping level and radiation dose. Notably, increased Al content and higher radiation exposure enhance the material’s absorption capacity while concurrently reducing the optical band gap, indicative of significant alterations in the electronic structure.
{"title":"Effect of gamma radiation on the optical properties of PMMA composites with varying Al concentrations","authors":"Batool A. Abu Saleh, Amani Kraishan, Ziad M. Elimat, Islam Abu Karaki, Ruba I. Alzubi, Hassan K. Juwhari","doi":"10.1016/j.radphyschem.2024.112342","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112342","url":null,"abstract":"This study explores the influence of gamma radiation on the optical properties of PMMA composites doped with aluminum (Al) at varying concentrations. The composites were irradiated with gamma doses of 50, 100, and 200 Gy, and their optical responses were systematically analyzed using UV–Vis spectroscopy. The results reveal a pronounced dependence of both the absorption coefficient and optical band gap on the Al doping level and radiation dose. Notably, increased Al content and higher radiation exposure enhance the material’s absorption capacity while concurrently reducing the optical band gap, indicative of significant alterations in the electronic structure.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"9 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665603","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 : 2024-10-25DOI: 10.1016/j.radphyschem.2024.112343
M. Sameeh, M. Khairy, Khaled Faisal Qasim
The study explored the effect of gamma-ray irradiation on the physical, magnetic, and electrochemical properties of ZnMn2O4 synthesized by the burning method. On the physical characterization side, the study utilized multiple metrology techniques to determine the impact of radiation dosage on bond lengths, density, crystallite size, micro strain, lattice constant, and dislocation density. No irradiation impact on the sample's tetragonal spinel structure was observed up to 250 kGy doses. However, the lattice parameters increased post-γ-irradiation and were apparent in the morphology change of irradiated samples compared to control spinel. Conversely, the magnetic parameters decreased post-irradiation based on the vibrating-sample magnetometry (VSM) testing of control and γ-irradiated samples. Changes in parameters like saturation magnetization (Ms) and magneton number (nB) can be attributed to ion-induced disorder and cation distribution in irradiated samples. Finally, the electrochemical testing showed supercapacitor behavior for all ZnMn2O4 samples, with a positive impact of radiation on electrical capacitance and stability. While the γ-irradiated sample with a 250 kGy dose showed a capacitance (Csp) of 515 F/g with 87.6% stability, the control sample had a Csp of 123 F/g and 78% stability. ZnMn2O4 material meets the needs of energy storage devices operating at high ionizing radiation doses.
{"title":"Effect of γ-rays irradiation on the structural, magnetic, and electrochemical properties of ZnMn2O4 nanoparticles","authors":"M. Sameeh, M. Khairy, Khaled Faisal Qasim","doi":"10.1016/j.radphyschem.2024.112343","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112343","url":null,"abstract":"The study explored the effect of gamma-ray irradiation on the physical, magnetic, and electrochemical properties of ZnMn<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> synthesized by the burning method. On the physical characterization side, the study utilized multiple metrology techniques to determine the impact of radiation dosage on bond lengths, density, crystallite size, micro strain, lattice constant, and dislocation density. No irradiation impact on the sample's tetragonal spinel structure was observed up to 250 kGy doses. However, the lattice parameters increased post-γ-irradiation and were apparent in the morphology change of irradiated samples compared to control spinel. Conversely, the magnetic parameters decreased post-irradiation based on the vibrating-sample magnetometry (VSM) testing of control and γ-irradiated samples. Changes in parameters like saturation magnetization (Ms) and magneton number (<ce:italic>n</ce:italic>B) can be attributed to ion-induced disorder and cation distribution in irradiated samples. Finally, the electrochemical testing showed supercapacitor behavior for all ZnMn<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> samples, with a positive impact of radiation on electrical capacitance and stability. While the γ-irradiated sample with a 250 kGy dose showed a capacitance (Csp) of 515 F/g with 87.6% stability, the control sample had a C<ce:inf loc=\"post\">sp</ce:inf> of 123 F/g and 78% stability. ZnMn<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> material meets the needs of energy storage devices operating at high ionizing radiation doses.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"112 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665604","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 : 2024-10-23DOI: 10.1016/j.radphyschem.2024.112329
Pei Sun , Huayang Zhang , Liang Xing , Bin Zhong , Yangjun Ying , Huayun Shen
The point kernel integration method is commonly utilized for the analytical calculation of gamma radiation fields in the field of radiation protection and shielding design. This study introduces NPTS-PK, a program developed for rapid calculation of 3D gamma radiation fields based on the NPTS program and the point kernel integration method. Based on the geometric construction and input method of the NPTS program, NPTS-PK supports point kernel calculations for radiation sources and shielding structures of various complex shapes and materials. By calculating material attenuation coefficients using continuous energy cross-section parameters, combined with a more precise buildup factor calculation method, the accuracy of calculation results has been enhanced. Improvements in ray tracing processes and the implementation of the probability neighbor list method have accelerated geometric processing. To address the challenge of excessive computation time associated with large-scale grid counting in point kernel programs, NPTS-PK integrates several efficient acceleration techniques, elevating the speed of radiation field calculation by an order of magnitude. Tests on typical model and engineering scenario demonstrate that the deviation between NPTS-PK results and the reference values is within a few tens of percent, and the computational efficiency and accuracy are improved compared to the standard point kernel programs.
{"title":"NPTS-PK: A new point kernel code for fast calculation of 3D gamma radiation field","authors":"Pei Sun , Huayang Zhang , Liang Xing , Bin Zhong , Yangjun Ying , Huayun Shen","doi":"10.1016/j.radphyschem.2024.112329","DOIUrl":"10.1016/j.radphyschem.2024.112329","url":null,"abstract":"<div><div>The point kernel integration method is commonly utilized for the analytical calculation of gamma radiation fields in the field of radiation protection and shielding design. This study introduces NPTS-PK, a program developed for rapid calculation of 3D gamma radiation fields based on the NPTS program and the point kernel integration method. Based on the geometric construction and input method of the NPTS program, NPTS-PK supports point kernel calculations for radiation sources and shielding structures of various complex shapes and materials. By calculating material attenuation coefficients using continuous energy cross-section parameters, combined with a more precise buildup factor calculation method, the accuracy of calculation results has been enhanced. Improvements in ray tracing processes and the implementation of the probability neighbor list method have accelerated geometric processing. To address the challenge of excessive computation time associated with large-scale grid counting in point kernel programs, NPTS-PK integrates several efficient acceleration techniques, elevating the speed of radiation field calculation by an order of magnitude. Tests on typical model and engineering scenario demonstrate that the deviation between NPTS-PK results and the reference values is within a few tens of percent, and the computational efficiency and accuracy are improved compared to the standard point kernel programs.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112329"},"PeriodicalIF":2.8,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554679","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 : 2024-10-23DOI: 10.1016/j.radphyschem.2024.112345
Mohammed G.M. Zeariya , Sara Kh.M. El-Shennawy , Ahmed Kassar , Mohammed Ismail Humaida , Rakesh Kumar , Mostafa Ahmed Mohammed , M.A. El-Morsy , A.A. Menazea
Our study investigates the influence of several doses of gamma rays on the antibacterial behavior of nanocomposite of silver nanoparticles (AgNPs) doped in a blend of poly (vinyl alcohol) (PVA)-Polyvinyl Pyrrolidone (PVP). AgNPs@PVA-PVP nanocomposite films were fabricated via laser ablation route, and then the synthesized films were subjected to various gamma ray's doses. X-ray diffraction (XRD) data shows a diffraction peak at 2θ = 38° assigned to the existence of AgNPs. Ultraviolet–visible (UV–Vis) results confirm the characteristic peak of silver nanoparticles at 425 nm. The cell viability and antibacterial behavior results confirmed the enhancement in the performance of AgNPs@PVA-PVP composite after irradiated to gamma rays. These values of cell viability have been raised by increasing the dose of gamma rays to 94.5 ± 6.5 % for dose at 70 kGy gamma rays. The values of the inhibition zone of microorganisms were enhanced by raising the doses of gamma rays to 19.5 ± 0.5 and 21.3 ± 0.6 against E. coli and S. aureus respectively specifically for nanocomposite with gamma dose 70 kGy. Thus, the improved antibacterial activity of AgNPs@PVA-PVP nanocomposite could be used in biomedical applications.
{"title":"Improvement of antibacterial activity of AgNPs@PVA-PVP ternary nanocomposite films followed by gamma-ray irradiation treatment for biomedical applications","authors":"Mohammed G.M. Zeariya , Sara Kh.M. El-Shennawy , Ahmed Kassar , Mohammed Ismail Humaida , Rakesh Kumar , Mostafa Ahmed Mohammed , M.A. El-Morsy , A.A. Menazea","doi":"10.1016/j.radphyschem.2024.112345","DOIUrl":"10.1016/j.radphyschem.2024.112345","url":null,"abstract":"<div><div>Our study investigates the influence of several doses of gamma rays on the antibacterial behavior of nanocomposite of silver nanoparticles (AgNPs) doped in a blend of poly (vinyl alcohol) (PVA)-Polyvinyl Pyrrolidone (PVP). AgNPs@PVA-PVP nanocomposite films were fabricated via laser ablation route, and then the synthesized films were subjected to various gamma ray's doses. X-ray diffraction (XRD) data shows a diffraction peak at 2θ = 38° assigned to the existence of AgNPs. Ultraviolet–visible (UV–Vis) results confirm the characteristic peak of silver nanoparticles at 425 nm. The cell viability and antibacterial behavior results confirmed the enhancement in the performance of AgNPs@PVA-PVP composite after irradiated to gamma rays. These values of cell viability have been raised by increasing the dose of gamma rays to 94.5 ± 6.5 % for dose at 70 kGy gamma rays. The values of the inhibition zone of microorganisms were enhanced by raising the doses of gamma rays to 19.5 ± 0.5 and 21.3 ± 0.6 against <em>E. coli</em> and <em>S. aureus</em> respectively specifically for nanocomposite with gamma dose 70 kGy. Thus, the improved antibacterial activity of AgNPs@PVA-PVP nanocomposite could be used in biomedical applications.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112345"},"PeriodicalIF":2.8,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554680","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 : 2024-10-23DOI: 10.1016/j.radphyschem.2024.112328
Handan Yilmaz, İskender Atilla Reyhancan
Environmental dose values are critical for human health in non-destructive analysis systems. The International Commission on Radiological Protection (ICRP) has defined specific limitations for permissible dose values. This study assesses the dose distribution of a prototype analysis device utilizing Californium-252 (252Cf) radioactive material through both Monte Carlo simulations and laboratory experiments. Conducted at the Istanbul Technical University (ITU) Energy Institute, the experimental investigation measured gamma-ray and neutron dose values surrounding the device. The objective was to compare dose maps generated by the Monte Carlo-based GEANT4 code with experimental data. Ten dose maps were created, and fundamental statistical analyses were performed. Results indicate that the dose values on the operator’s working surface of the prototype device are within ICRP limits, not exceeding 1 millisievert (mSv) annually, with an effective dose rate of 0.949±0.052 mSv per year. These findings underscore the device’s potential for safe and effective use in radiation safety and environmental dose assessment.
{"title":"Dose mapping of a 252Cf based non-destructive on-line elemental analysis device using Monte Carlo simulation and verification with experimental results","authors":"Handan Yilmaz, İskender Atilla Reyhancan","doi":"10.1016/j.radphyschem.2024.112328","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112328","url":null,"abstract":"Environmental dose values are critical for human health in non-destructive analysis systems. The International Commission on Radiological Protection (ICRP) has defined specific limitations for permissible dose values. This study assesses the dose distribution of a prototype analysis device utilizing Californium-252 (<ce:sup loc=\"pre\">252</ce:sup>Cf) radioactive material through both Monte Carlo simulations and laboratory experiments. Conducted at the Istanbul Technical University (ITU) Energy Institute, the experimental investigation measured gamma-ray and neutron dose values surrounding the device. The objective was to compare dose maps generated by the Monte Carlo-based GEANT4 code with experimental data. Ten dose maps were created, and fundamental statistical analyses were performed. Results indicate that the dose values on the operator’s working surface of the prototype device are within ICRP limits, not exceeding 1 millisievert (mSv) annually, with an effective dose rate of <mml:math altimg=\"si1.svg\" display=\"inline\"><mml:mrow><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>949</mml:mn><mml:mo>±</mml:mo><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>052</mml:mn></mml:mrow></mml:math> mSv per year. These findings underscore the device’s potential for safe and effective use in radiation safety and environmental dose assessment.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"52 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665606","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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