Pub Date : 2024-12-27DOI: 10.1016/j.radphyschem.2024.112489
Sepideh Yazdani-Darki, Mohammad Eslami-Kalantari, Hakimeh Zare, Ahmad Ramazani-MoghaddamArani
This study has been devoted to investigating the radiation shielding performance of Poly(vinyl chloride)-based nanostructures lead oxide (PbO) and tungsten oxide (WO3) reinforced composites. The scanning electron microscopy (SEM) images depicted the particle size and morphology of nanostructures such as PbO nanorods and WO3 nanoparticles. X-ray diffraction (XRD) results demonstrated a successful fabrication of a hybrid nanocomposite. The gamma-ray spectroscopy experiments have been carried out using a NaI(Tl) scintillation detector and Cs-137, Co- 60, and AM-241 sources and X-ray. The different weight percentages of each by mass were 5, 10, 20, 30, and 40 wt %, of mixed composite (35, 30, 20, 10, 5 wt % WO3 + 5, 10, 20, 30, 35 wt % PbO). The mass attenuation coefficients of the investigated composites were measured as a function of gamma-ray energies and X-rays utilizing standard radioactive sources. Increasing the PbO or WO3 nanostructures' weight percentages in the nanocomposites leads to increased radiation attenuation. Based on the results, the best radiation attenuation, the optimal half-value layer, the tenth value layer, and the mean free path were for PVC/WO3 5% + 35% PbO and PVC/WO3 10% + 30% PbO hybrid nanocomposite for Am-241, Cs-137, Co-60, and X-ray that replaced hybrid nanocomposite PVC/PbO 40%.
{"title":"Preparation and structural characterization of PbO and WO3-PVC hybrid nanocomposites for gamma-ray radiation shielding","authors":"Sepideh Yazdani-Darki, Mohammad Eslami-Kalantari, Hakimeh Zare, Ahmad Ramazani-MoghaddamArani","doi":"10.1016/j.radphyschem.2024.112489","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112489","url":null,"abstract":"This study has been devoted to investigating the radiation shielding performance of Poly(vinyl chloride)-based nanostructures lead oxide (PbO) and tungsten oxide (WO<ce:inf loc=\"post\">3</ce:inf>) reinforced composites. The scanning electron microscopy (SEM) images depicted the particle size and morphology of nanostructures such as PbO nanorods and WO<ce:inf loc=\"post\">3</ce:inf> nanoparticles. X-ray diffraction (XRD) results demonstrated a successful fabrication of a hybrid nanocomposite. The gamma-ray spectroscopy experiments have been carried out using a NaI(Tl) scintillation detector and Cs-137, Co- 60, and AM-241 sources and X-ray. The different weight percentages of each by mass were 5, 10, 20, 30, and 40 wt %, of mixed composite (35, 30, 20, 10, 5 wt % WO<ce:inf loc=\"post\">3</ce:inf> + 5, 10, 20, 30, 35 wt % PbO). The mass attenuation coefficients of the investigated composites were measured as a function of gamma-ray energies and X-rays utilizing standard radioactive sources. Increasing the PbO or WO<ce:inf loc=\"post\">3</ce:inf> nanostructures' weight percentages in the nanocomposites leads to increased radiation attenuation. Based on the results, the best radiation attenuation, the optimal half-value layer, the tenth value layer, and the mean free path were for PVC/WO<ce:inf loc=\"post\">3</ce:inf> 5% + 35% PbO and PVC/WO<ce:inf loc=\"post\">3</ce:inf> 10% + 30% PbO hybrid nanocomposite for Am-241, Cs-137, Co-60, and X-ray that replaced hybrid nanocomposite PVC/PbO 40%.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"37 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925321","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 : 2024-12-27DOI: 10.1016/j.radphyschem.2024.112494
Ayysha Shihab Ahmed , Taiseer Abdul-kader Saleh , Hamid J. Mohammad , Amer Adnan Hasan , Suror A. Mahdi , Zamzam Alhuwaymil , Sohad A. Alshareef , Ayad T. Mahmood , Mohammed H. Al-Mashhadani
Herein, we have designed and introduced novel fluorescent molecule as photo stabilizer of poly(lactic acid). This work is presenting a novel approach using Donor-Acceptor-Donor (D-A-D) molecules synthesized through a one-step procedure. The D-A-D moiety demonstrates remarkable photo-stabilization capabilities for PLA films. Characterization techniques including 1H NMR, 13C NMR, FTIR, spectroscopies and SEM patterns confirm the successful synthesis of the D-A-D molecule and its efficient blended into PLA films. Interestingly, Ultraviolet (UV) and photoluminescence (PL) measurements reveal the D-A-D molecule's ability to absorb UV light and emit fluorescent green light, indicative of its photo-stabilization mechanism. Further analysis elucidates the interaction between the D-A-D molecule and the PLA polymer backbone, ensuring a homogenous distribution of the stabilizer within the film matrix and enhancing overall stability. The proposed mechanism involves the D-A-D molecule effectively absorb UV light generated during photo-degradation and emits it as visible green light without harming the chemical structure of PLA film. Our findings underscore the potential of D-A-D molecules as versatile photo-stabilizers for PLA and highlight their broader implications for sustainable material applications. This study contributes to the advancement of PLA film stability and opens doors for the development of innovative stabilization strategies depending on organic electronic principles. Future research could explore multifunctional applications of D-A-D molecules, including sensor materials and other applications.
{"title":"New generation photo-stabilizer strategies of Poly(lactic acid), donor-acceptor-donor segment as a fluorescent additive","authors":"Ayysha Shihab Ahmed , Taiseer Abdul-kader Saleh , Hamid J. Mohammad , Amer Adnan Hasan , Suror A. Mahdi , Zamzam Alhuwaymil , Sohad A. Alshareef , Ayad T. Mahmood , Mohammed H. Al-Mashhadani","doi":"10.1016/j.radphyschem.2024.112494","DOIUrl":"10.1016/j.radphyschem.2024.112494","url":null,"abstract":"<div><div>Herein, we have designed and introduced novel fluorescent molecule as photo stabilizer of poly(lactic acid). This work is presenting a novel approach using Donor-Acceptor-Donor (D-A-D) molecules synthesized through a one-step procedure. The D-A-D moiety demonstrates remarkable photo-stabilization capabilities for PLA films. Characterization techniques including <sup>1</sup>H NMR, <sup>13</sup>C NMR, FTIR, spectroscopies and SEM patterns confirm the successful synthesis of the D-A-D molecule and its efficient blended into PLA films. Interestingly, Ultraviolet (UV) and photoluminescence (PL) measurements reveal the D-A-D molecule's ability to absorb UV light and emit fluorescent green light, indicative of its photo-stabilization mechanism. Further analysis elucidates the interaction between the D-A-D molecule and the PLA polymer backbone, ensuring a homogenous distribution of the stabilizer within the film matrix and enhancing overall stability. The proposed mechanism involves the D-A-D molecule effectively absorb UV light generated during photo-degradation and emits it as visible green light without harming the chemical structure of PLA film. Our findings underscore the potential of D-A-D molecules as versatile photo-stabilizers for PLA and highlight their broader implications for sustainable material applications. This study contributes to the advancement of PLA film stability and opens doors for the development of innovative stabilization strategies depending on organic electronic principles. Future research could explore multifunctional applications of D-A-D molecules, including sensor materials and other applications.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112494"},"PeriodicalIF":2.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925319","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 : 2024-12-27DOI: 10.1016/j.radphyschem.2024.112491
Simone Sala, Karin Rengefors, Jenni Kiventerä, Minna Patanen, Lina Gefors, Christian Werdinius, Sofia Winge, Karin Broberg, Sebastian Kalbfleisch, Kajsa Sigfridsson Clauss
X-ray fluorescence emission spectroscopy is a powerful tool to gain chemical information on a wide variety of samples. Its combination with focused X-ray beams and translation stages enables X-ray fluorescence microscopy, generating quantitative distribution maps for sets of chemical elements, depending on incident photon energy and detector specifications. The use of synchrotron radiation for X-ray fluorescence microscopy has led to unprecedented performance: with the advent of 4th generation synchrotron facilities such as MAX IV, the increase of the achievable incident photon flux has made higher sensitivity and measuring speed possible, while new nanofocus capabilities have enabled nanoscale spatial resolution. Here, an overview of recent and ongoing research is presented from selected two-dimensional X-ray fluorescence microscopy experiments carried out at NanoMAX, the hard X-ray nanoprobe beamline at MAX IV. Results showcase the technique's versatility, as it is applied to microalgae, human dental tissue and engineered materials.
{"title":"Applications of X-ray fluorescence microscopy with synchrotron radiation: From biology to materials science","authors":"Simone Sala, Karin Rengefors, Jenni Kiventerä, Minna Patanen, Lina Gefors, Christian Werdinius, Sofia Winge, Karin Broberg, Sebastian Kalbfleisch, Kajsa Sigfridsson Clauss","doi":"10.1016/j.radphyschem.2024.112491","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112491","url":null,"abstract":"X-ray fluorescence emission spectroscopy is a powerful tool to gain chemical information on a wide variety of samples. Its combination with focused X-ray beams and translation stages enables X-ray fluorescence microscopy, generating quantitative distribution maps for sets of chemical elements, depending on incident photon energy and detector specifications. The use of synchrotron radiation for X-ray fluorescence microscopy has led to unprecedented performance: with the advent of 4th generation synchrotron facilities such as MAX IV, the increase of the achievable incident photon flux has made higher sensitivity and measuring speed possible, while new nanofocus capabilities have enabled nanoscale spatial resolution. Here, an overview of recent and ongoing research is presented from selected two-dimensional X-ray fluorescence microscopy experiments carried out at NanoMAX, the hard X-ray nanoprobe beamline at MAX IV. Results showcase the technique's versatility, as it is applied to microalgae, human dental tissue and engineered materials.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"2 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925320","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 : 2024-12-24DOI: 10.1016/j.radphyschem.2024.112486
Zhixiao Lian , Xiayan Cao , Yuying Li , Yang Yang , Xueyan Zhao , Shichun Li , Chunhua Zhu , Yu Liu
This study explores the impact of γ-rays on the aggregation structure and mechanical properties of poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDF-CTFE)) copolymer. γ-Irradiation altered the polymer's aggregation structure, leading to notable changes in mechanical performance. FT-IR and NMR analysis confirmed dehalogenation and oxidation reactions upon irradiation, which triggered structural alterations. High doses promoted crosslinking, evidenced by gelation in ethyl acetate, accompanied by molecular weight reduction due to degradation. Tensile tests revealed increased strength and decreased fracture strain with irradiation, attributed to a stable crosslinking network inhibiting crystallization and influencing polymer orientation, as observed by SAXS, DSC, and TGA showed decreased thermal stability post-irradiation. Our findings highlight the interaction between the structural changes caused by γ-rays and the macroscopic mechanical properties of P(VDF-CTFE), provide insights into the modification of polymers by γ-rays, and provide information for the application of materials science.
{"title":"Gamma irradiation-induced structural evolution and mechanical response of P(VDF-CTFE) copolymer","authors":"Zhixiao Lian , Xiayan Cao , Yuying Li , Yang Yang , Xueyan Zhao , Shichun Li , Chunhua Zhu , Yu Liu","doi":"10.1016/j.radphyschem.2024.112486","DOIUrl":"10.1016/j.radphyschem.2024.112486","url":null,"abstract":"<div><div>This study explores the impact of γ-rays on the aggregation structure and mechanical properties of poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDF-CTFE)) copolymer. γ-Irradiation altered the polymer's aggregation structure, leading to notable changes in mechanical performance. FT-IR and NMR analysis confirmed dehalogenation and oxidation reactions upon irradiation, which triggered structural alterations. High doses promoted crosslinking, evidenced by gelation in ethyl acetate, accompanied by molecular weight reduction due to degradation. Tensile tests revealed increased strength and decreased fracture strain with irradiation, attributed to a stable crosslinking network inhibiting crystallization and influencing polymer orientation, as observed by SAXS, DSC, and TGA showed decreased thermal stability post-irradiation. Our findings highlight the interaction between the structural changes caused by γ-rays and the macroscopic mechanical properties of P(VDF-CTFE), provide insights into the modification of polymers by γ-rays, and provide information for the application of materials science.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112486"},"PeriodicalIF":2.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889187","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 : 2024-12-24DOI: 10.1016/j.radphyschem.2024.112481
Zhanbin Chen
We present extended theoretical calculations of atomic parameters for the aluminum-like Mo XXX. The multiconfiguration Dirac–Fock method, accounting for the Breit interaction and quantum electrodynamics effects is used in the calculate. Energy levels and lifetimes for the 212 levels resulting from the (1s22s22p6) 3s23p, 3p3, 3s3p3d, 3s23d, 3d3, 3s3p2, 3p3d2, 3p23d, 3s3d2, 3s24p, 3s24f, 3s3p4s, 3s24s, 3s3p4d, 3s24d, and 3s3p4p configurations are presented. Wavelengths, transition energies, oscillator strengths, and transition probabilities among these configurations are given. The accuracy is carefully estimated by comparing the results with experimental data and values calculated using different gauges. This work provides an accurate data set that is expected to be useful in fusion research.
{"title":"Theoretical study of energy levels and transition rates in Al-like Mo XXX","authors":"Zhanbin Chen","doi":"10.1016/j.radphyschem.2024.112481","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112481","url":null,"abstract":"We present extended theoretical calculations of atomic parameters for the aluminum-like Mo XXX. The multiconfiguration Dirac–Fock method, accounting for the Breit interaction and quantum electrodynamics effects is used in the calculate. Energy levels and lifetimes for the 212 levels resulting from the (1s<ce:sup loc=\"post\">2</ce:sup>2s<ce:sup loc=\"post\">2</ce:sup>2p<ce:sup loc=\"post\">6</ce:sup>) 3s<ce:sup loc=\"post\">2</ce:sup>3p, 3p<ce:sup loc=\"post\">3</ce:sup>, 3s3p3d, 3s<ce:sup loc=\"post\">2</ce:sup>3d, 3d<ce:sup loc=\"post\">3</ce:sup>, 3s3p<ce:sup loc=\"post\">2</ce:sup>, 3p3d<ce:sup loc=\"post\">2</ce:sup>, 3p<ce:sup loc=\"post\">2</ce:sup>3d, 3s3d<ce:sup loc=\"post\">2</ce:sup>, 3s<ce:sup loc=\"post\">2</ce:sup>4p, 3s<ce:sup loc=\"post\">2</ce:sup>4f, 3s3p4s, 3s<ce:sup loc=\"post\">2</ce:sup>4s, 3s3p4d, 3s<ce:sup loc=\"post\">2</ce:sup>4d, and 3s3p4p configurations are presented. Wavelengths, transition energies, oscillator strengths, and transition probabilities among these configurations are given. The accuracy is carefully estimated by comparing the results with experimental data and values calculated using different gauges. This work provides an accurate data set that is expected to be useful in fusion research.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"65 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901885","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}
Agar and polybutylene adipate-co terephthalate (PBAT) blend pellets were prepared by melt-extrusion with a high agar composition. The resulting plastic pellets were treated with gamma radiation to induces crosslinking and compatibilized the blending. The blending was irradiated in various doses, which was 10 kGy, 30 kGy, and 50 kGy. The effect of gamma irradiation on the plastic pellet were studied in terms of chemical structure, thermal properties, tensile properties, water resistivity and biodegradability. The irradiation 30 kGy increases the tensile strength from 3.21 MPa to 4.51 MPa, implying successful modification with radiation. The melting temperature (Tm) increased by irradiation doses from 91 °C to 110 °C. The crosslinking reaction of gamma irradiation causes the improved mechanical and thermal properties of irradiation agar/PBAT pellets. The water resistivity decreased, causing the formation of hydrophobic groups in the agar/PBAT pellet after irradiation. It is revealed that the 30 kGy irradiation dose is the optimum dose of radiation as it increases the tensile strength and decreases the water sensitivity significantly. The gamma irradiation reduced degradation with microbial growth from 82,91% to 75,88%, resulting in an improved antibacterial activity. These results show that gamma radiation can improve the properties of agar/PBAT plastic pellets and potentially be used as an antibacterial packaging.
{"title":"Compatibility induced gamma radiation of Agar/PBAT blends: Impact on material properties","authors":"Rossy Choerun Nissa , Aisyah Hanifah , Efri Mardawati , Pramono Nugroho , Misri Gozan , Kasbawati Kasbawati , Biqiong Chen , Yeyen Nurhamiyah","doi":"10.1016/j.radphyschem.2024.112487","DOIUrl":"10.1016/j.radphyschem.2024.112487","url":null,"abstract":"<div><div>Agar and polybutylene adipate-co terephthalate (PBAT) blend pellets were prepared by melt-extrusion with a high agar composition. The resulting plastic pellets were treated with gamma radiation to induces crosslinking and compatibilized the blending. The blending was irradiated in various doses, which was 10 kGy, 30 kGy, and 50 kGy. The effect of gamma irradiation on the plastic pellet were studied in terms of chemical structure, thermal properties, tensile properties, water resistivity and biodegradability. The irradiation 30 kGy increases the tensile strength from 3.21 MPa to 4.51 MPa, implying successful modification with radiation. The melting temperature (T<sub>m</sub>) increased by irradiation doses from 91 °C to 110 °C. The crosslinking reaction of gamma irradiation causes the improved mechanical and thermal properties of irradiation agar/PBAT pellets. The water resistivity decreased, causing the formation of hydrophobic groups in the agar/PBAT pellet after irradiation. It is revealed that the 30 kGy irradiation dose is the optimum dose of radiation as it increases the tensile strength and decreases the water sensitivity significantly. The gamma irradiation reduced degradation with microbial growth from 82,91% to 75,88%, resulting in an improved antibacterial activity. These results show that gamma radiation can improve the properties of agar/PBAT plastic pellets and potentially be used as an antibacterial packaging.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112487"},"PeriodicalIF":2.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925322","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 : 2024-12-22DOI: 10.1016/j.radphyschem.2024.112485
Hans Rabus
The conclusions drawn in the paper commented on are not supported by the data shown. A background signal that is twice as high as the change over the relevant dose range disqualifies a material for use in dosimetry due to the resulting uncertainty and lack of linearity range. The reported differences in responses and background signals by a factor of 2 between comparable photon spectra indicate that the data are compromised by problems with the dose determination and the annealing process and therefore cannot be considered trustworthy.
{"title":"Comment on “h-BN layered material: A new frontier in radiation dosimetry” by Khandaker et al. [Radiation Physics and Chemistry 223 (2024) 111950]","authors":"Hans Rabus","doi":"10.1016/j.radphyschem.2024.112485","DOIUrl":"10.1016/j.radphyschem.2024.112485","url":null,"abstract":"<div><div>The conclusions drawn in the paper commented on are not supported by the data shown. A background signal that is twice as high as the change over the relevant dose range disqualifies a material for use in dosimetry due to the resulting uncertainty and lack of linearity range. The reported differences in responses and background signals by a factor of 2 between comparable photon spectra indicate that the data are compromised by problems with the dose determination and the annealing process and therefore cannot be considered trustworthy.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112485"},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180486","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 : 2024-12-21DOI: 10.1016/j.radphyschem.2024.112479
Merfat Algethami , Roya Boudaghi Malidarreh , V. Yu Ivanov , Shams A. M. Issa , Mayeen Uddin Khandaker , Iskender Akkurt , Hesham M.H. Zakaly
The present study is dedicated to deriving radiation shielding and mechanical features of the tellurium dioxide-zinc oxide-nickel oxide (TeO2–ZnO–NiO) preferred glass systems. The radiation shielding and mechanical parameters have been obtained by leveraging the FLUKA Monte Carlo (MC) approach and theoretical analysis. Attenuation factors have been carried out for different ratios of Te: Zn (i.e., 4:1, 7:3, 3:2) and 2 cm thickness glass specimen. Three NiO mole fractions are investigated for this purpose. Among the three-glass series, 7:3 specimens possess the highest radiation shielding, improving the space-efficiency. In addition, the Zeff increases with the rising TeO2 concentration in the glass structure, especially in the high energy range. Furthermore, reducing the amount of ZnO as a network modifier in the glass increases the molar volume. Moreover, we successfully increased the mechanical module of the provided glass specimens utilizing MM model. The outcomes of the present work are suitable for further studies related to the ternary Te glass series.
{"title":"A promising alternative: A pathway to superior mechanical and radiation shielding performance of ternary TeO2–ZnO–NiO glass system","authors":"Merfat Algethami , Roya Boudaghi Malidarreh , V. Yu Ivanov , Shams A. M. Issa , Mayeen Uddin Khandaker , Iskender Akkurt , Hesham M.H. Zakaly","doi":"10.1016/j.radphyschem.2024.112479","DOIUrl":"10.1016/j.radphyschem.2024.112479","url":null,"abstract":"<div><div>The present study is dedicated to deriving radiation shielding and mechanical features of the tellurium dioxide-zinc oxide-nickel oxide (TeO<sub>2</sub>–ZnO–NiO) preferred glass systems. The radiation shielding and mechanical parameters have been obtained by leveraging the FLUKA Monte Carlo (MC) approach and theoretical analysis. Attenuation factors have been carried out for different ratios of Te: Zn (i.e., 4:1, 7:3, 3:2) and 2 cm thickness glass specimen. Three NiO mole fractions are investigated for this purpose. Among the three-glass series, 7:3 specimens possess the highest radiation shielding, improving the space-efficiency. In addition, the Z<sub>eff</sub> increases with the rising TeO<sub>2</sub> concentration in the glass structure, especially in the high energy range. Furthermore, reducing the amount of ZnO as a network modifier in the glass increases the molar volume. Moreover, we successfully increased the mechanical module of the provided glass specimens utilizing MM model. The outcomes of the present work are suitable for further studies related to the ternary Te glass series.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112479"},"PeriodicalIF":2.8,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889189","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 : 2024-12-19DOI: 10.1016/j.radphyschem.2024.112484
Chaitali V. More , Nilesh L. Tarwal , Sunil N. Botewad , Mohd Anis , Vishnu V. Kutwade , Ferdi Akman , Osman Agar , Pravina P. Pawar
The present study has reported the radiation shielding properties of polymeric composites adding tin oxide (SnO2) as a filler. For the purpose of assessing gamma-ray and neutron attenuation properties of the new unsaturated polyester resin composites with different SnO2 concentrations, samples were synthesized with successively increasing loadings of SnO2. Theoretical, simulated, and experimental evaluations have shown a great match among experimental, computational, and simulation over a wide photon energy range (122 keV–1330 keV) using NaI (Tl) scintillation detectors, WinXCom computational code, and Monte Carlo (GEANT4) simulations. Fast neutron removal cross-sections (ΣR), shielding properties against fast neutrons, were calculated. XRD, FE-SEM, and EDX structural grades were conducted to analyze microstructure of the composite and justify the dispersal of SnO2 in that matrix. The composite code-named S5 with SnO2 concentrations at 50% has the highest gamma and neutron shielding ability among all samples. Additionally, the compressive strength tests demonstrated the possibility of incorporating SnO2 in enhancing mechanical properties by improving structures while ensuring a reasonably good protection against radiation.
本文报道了以氧化锡（SnO2）为填料的聚合物复合材料的辐射屏蔽性能。为了评估不同SnO2浓度的新型不饱和聚酯树脂复合材料的γ射线和中子衰减性能，合成了逐渐增加SnO2负荷量的样品。利用NaI （Tl）闪烁探测器、WinXCom计算代码和Monte Carlo （GEANT4）模拟，理论、模拟和实验评估表明，在宽光子能量范围（122 kv - 1330 keV）内，实验、计算和模拟之间存在很大的匹配。计算了快中子去除截面（ΣR），以及对快中子的屏蔽性能。通过XRD、FE-SEM和EDX结构分级分析了复合材料的微观结构，证明了SnO2在基体中的分散。在所有样品中，SnO2浓度为50%的S5复合材料屏蔽γ和中子的能力最高。此外，抗压强度测试表明，加入SnO2可以通过改善结构来提高机械性能，同时确保对辐射的良好防护。
{"title":"Radiation shielding efficacy of unsaturated polyester composites for gamma and neutron attenuation-enhanced with SnO2","authors":"Chaitali V. More , Nilesh L. Tarwal , Sunil N. Botewad , Mohd Anis , Vishnu V. Kutwade , Ferdi Akman , Osman Agar , Pravina P. Pawar","doi":"10.1016/j.radphyschem.2024.112484","DOIUrl":"10.1016/j.radphyschem.2024.112484","url":null,"abstract":"<div><div>The present study has reported the radiation shielding properties of polymeric composites adding tin oxide (SnO<sub>2</sub>) as a filler. For the purpose of assessing gamma-ray and neutron attenuation properties of the new unsaturated polyester resin composites with different SnO<sub>2</sub> concentrations, samples were synthesized with successively increasing loadings of SnO<sub>2</sub>. Theoretical, simulated, and experimental evaluations have shown a great match among experimental, computational, and simulation over a wide photon energy range (122 keV–1330 keV) using NaI (Tl) scintillation detectors, WinXCom computational code, and Monte Carlo (GEANT4) simulations. Fast neutron removal cross-sections (Σ<sub>R</sub>), shielding properties against fast neutrons, were calculated. XRD, FE-SEM, and EDX structural grades were conducted to analyze microstructure of the composite and justify the dispersal of SnO<sub>2</sub> in that matrix. The composite code-named S5 with SnO<sub>2</sub> concentrations at 50% has the highest gamma and neutron shielding ability among all samples. Additionally, the compressive strength tests demonstrated the possibility of incorporating SnO<sub>2</sub> in enhancing mechanical properties by improving structures while ensuring a reasonably good protection against radiation.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112484"},"PeriodicalIF":2.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874799","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 : 2024-12-19DOI: 10.1016/j.radphyschem.2024.112474
Raghda Sabry , Asmaa Sayed , Ibrahim E.T. El-Sayed , Ghada A. Mahmoud
The development of natural polymer-based biofilms with enhanced mechanical and barrier properties is of great interest for sustainable food packaging. This study explores the optimization of pectin/polyacrylamide (PEC/PAAm) biofilms via e-beam irradiation-induced copolymerization and crosslinking. Initial optimization of polymer concentration and pectin/acrylamide ratio at 10 kGy irradiation led to biofilms with improved mechanical properties, reduced moisture content, water vapor transmission rate (WVTR), and oxygen permeability (OP). Further investigation of irradiation dose at 25 wt% total polymer concentration and a 1:1 pectin/PAAm ratio revealed that 30 kGy irradiation optimally enhanced the biofilm's mechanical, thermal, and barrier properties. These results provide a foundation for future work in enhancing food shelf life using bioactive additives incorporated into optimized biofilms.
{"title":"Optimizing pectin-based biofilm properties for food packaging via E-beam irradiation","authors":"Raghda Sabry , Asmaa Sayed , Ibrahim E.T. El-Sayed , Ghada A. Mahmoud","doi":"10.1016/j.radphyschem.2024.112474","DOIUrl":"10.1016/j.radphyschem.2024.112474","url":null,"abstract":"<div><div>The development of natural polymer-based biofilms with enhanced mechanical and barrier properties is of great interest for sustainable food packaging. This study explores the optimization of pectin/polyacrylamide (PEC/PAAm) biofilms via e-beam irradiation-induced copolymerization and crosslinking. Initial optimization of polymer concentration and pectin/acrylamide ratio at 10 kGy irradiation led to biofilms with improved mechanical properties, reduced moisture content, water vapor transmission rate (WVTR), and oxygen permeability (OP). Further investigation of irradiation dose at 25 wt% total polymer concentration and a 1:1 pectin/PAAm ratio revealed that 30 kGy irradiation optimally enhanced the biofilm's mechanical, thermal, and barrier properties. These results provide a foundation for future work in enhancing food shelf life using bioactive additives incorporated into optimized biofilms.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112474"},"PeriodicalIF":2.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889196","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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