Radiation Physics and Chemistry最新文献

{"title":"Hematite Fe2O3 effects on the structural, morphological, and optical characteristics of PVP polymer for optoelectronic uses","authors":"Mohammed O. Alziyadi ,&nbsp;Asma Alkabsh","doi":"10.1016/j.radphyschem.2025.112577","DOIUrl":"10.1016/j.radphyschem.2025.112577","url":null,"abstract":"<div><div>Herein, PVP/Fe₂O₃ films were produced by adding Fe₂O₃ nanoparticles with varying proportions into the PVP matrix by the casting technique. Using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), surface roughness testing, contact angle goniometry, and UV/Vis technique, the optical and structural behaviors of the produced PVP/Fe₂O₃ films were examined. These methods facilitate comprehension of the effects of Fe₂O₃ addition on PVP characteristics. FTIR and SEM examined the structural change of PVP as the Fe₂O₃ concentration increased. The infrared spectra display that there are changes in response in the pure PVP due to the change the Fe₂O₃ nanoparticle concentrations, which causes variations in the absorption bands' intensity due to the formation of hydrogen bonds. SEM micrographs revealed a dispersed collection of homogeneously distributed nanoparticles within the PVP polymer matrix. Because of the surface chemical bonding, which is the consequence of the oxidation sustained by adding the nanoparticles, the film becomes rougher as the concentration of Fe₂O₃ increases. In comparison to the pure PVA sample, the absorbance spectra of the nanocomposite samples exhibited a shift toward the high wavelength values in the absorption edge, indicating a decrease in the energy gap and also, improves its optical conductivity and refractive index. The Wemple-DiDomenico model is employed to calculate the optical dispersion parameters. Additionally, nonlinear refractive index, linear optical susceptibility, and third-order nonlinear optical susceptibility were investigated. These findings demonstrate the enhanced optical and structural characteristics of Fe₂O₃-filled PVP films, highlighting their potential for optical applications.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112577"},"PeriodicalIF":2.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180488","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}

{"title":"Effect of gold and silver mixed nanofillers and gamma irradiation on the structure and physical properties of PVA/PVP nanocomposite","authors":"I.S. Elashmawi ,&nbsp;A.M. Abdelghany ,&nbsp;M.S. Meikhail ,&nbsp;A.A. Aldhabi","doi":"10.1016/j.radphyschem.2025.112558","DOIUrl":"10.1016/j.radphyschem.2025.112558","url":null,"abstract":"<div><div>Gold and silver nanoparticles (AuNPs and AgNPs) were synthesized using the leaf extract of <em>Chenopodium murale</em> (<em>C. murale</em>) via a green, eco-friendly synthesis approach. The nanoparticles were incorporated into a polyvinyl alcohol/polyvinyl pyrrolidone (PVA/PVP) matrix through the casting method to produce composite thin films. These films were subjected to gamma irradiation at doses of 3, 5, and 8 Mrad, and their structural and optical properties were systematically analyzed before and after gamma irradiation. FT-IR spectroscopy indicated significant structural rearrangements within the polymeric matrix, attributed to gamma irradiation effects. Ultraviolet–visible (UV–Vis) spectroscopy confirmed the presence of a strong charge transfer band in the UV region and characteristic surface plasmon resonance (SPR) peaks of AgNPs and AuNPs, observed in the 420–540 nm range. Detailed optical analysis enabled the determination of indirect and direct energy band gaps, revealing irradiation-induced modifications. Gamma irradiation influenced the size and distribution of nanoparticles, resulting in notable alterations in the structural and optical properties of the nanocomposite films. These findings underscore the potential of gamma-irradiated AuNP/AgNP composites in modern applications like optoelectronics and materials science, where tailored structural and optical properties are critical.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112558"},"PeriodicalIF":2.8,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143322062","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}

{"title":"End-to-End patient-specific VMAT quality assurance for common Head-and-Neck cancers using RANDO anthropomorphic phantom with OSLD","authors":"Youssef Adib ,&nbsp;Abdelhak Bouyhamarane ,&nbsp;Moulay Ali Youssoufi ,&nbsp;Lalla Btissam Drissi ,&nbsp;Mohammed Reda Mesradi ,&nbsp;Salwa Boutayeb ,&nbsp;Mustapha Driouch ,&nbsp;Adeb A.S.A. Almaamari ,&nbsp;Hanan El Kacemi ,&nbsp;Tayeb Kebdani ,&nbsp;Khalid Hassouni","doi":"10.1016/j.radphyschem.2025.112543","DOIUrl":"10.1016/j.radphyschem.2025.112543","url":null,"abstract":"<div><div>Patient-Specific Quality Assurance is usually performed using phantoms made of homogeneous materials with regular shapes and small sizes, which does not simulate real world considerations. This work aims to establish and implement an efficient end-to-end quality assurance protocol for Volumetric Modulated Arc Therapy treatment plans for Head-and-Neck (H&amp;N) cancers using adult RANDO anthropomorphic phantom to assess the overall treatment chain uncertainty and accuracy. Four VMAT treatment plans of H&amp;N cancers (Brain metastases, Parotid glands, Nasopharynx, and Larynx) were selected based on their clinical incidence frequency. The phantom passed through the same treatment process as patient to simulate a real world scenario. These plans were applied to the phantom as <em>QA-plans</em>. The mean dose discrepancies describing the entire plan deliverability and acceptability were 0.76% <span><math><mo>±</mo></math></span> 2.22%, 0.68% <span><math><mo>±</mo></math></span> 4.51%, 1.56% <span><math><mo>±</mo></math></span> 2.85%, and 2.04% <span><math><mo>±</mo></math></span> 3.53% for Brain metastases, parotid glands, nasopharyngeal, and laryngeal cancers respectively. Plans standard deviations (<span><math><mrow><mi>S</mi><msub><mrow><mi>D</mi></mrow><mrow><mi>T</mi><mi>P</mi><mi>S</mi><mo>−</mo><mi>O</mi><mi>S</mi><mi>L</mi><mi>D</mi></mrow></msub></mrow></math></span>) tend to increase with mean differences <span><math><mover><mrow><mi>M</mi><mi>a</mi><mi>x</mi><mo>−</mo><mi>m</mi><mi>i</mi><mi>n</mi></mrow><mo>¯</mo></mover></math></span> because of dose heterogeneity at the measurement positions. Over all plans, a lower difference of about 0.72% was shown between the highest and the lowest in-field standard deviation <span><math><mrow><mi>S</mi><msub><mrow><mi>D</mi></mrow><mrow><mi>i</mi><mi>n</mi></mrow></msub></mrow></math></span> (%). Out-of-field standard deviations <span><math><mrow><mi>S</mi><msub><mrow><mi>D</mi></mrow><mrow><mi>o</mi><mi>u</mi><mi>t</mi></mrow></msub></mrow></math></span> (%) indicated a highest dose discrepancy due to organ at risk to be spared. VMAT treatment plans for Head-and-Neck cancers are extremely complex processes, involving many uncertainties that could affect the desired plan administration accuracy. Therefore, it is essential to implement such an end-to-end test, in order to verify system ability to reach therapeutic goals and spare organs at risk, taking into account all the related uncertainties.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112543"},"PeriodicalIF":2.8,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077681","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}

{"title":"Application of electron beam treatment for degradation of pollutants in real textile wastewater","authors":"Smita Deogaonkar-Baride ,&nbsp;Sirisha Majji ,&nbsp;Mitesh Koli ,&nbsp;P. Saroj ,&nbsp;Asavari Dhavale","doi":"10.1016/j.radphyschem.2025.112567","DOIUrl":"10.1016/j.radphyschem.2025.112567","url":null,"abstract":"<div><div>Textile wastewater contains numerous nondegradable contaminants such as dyes, pigments, detergents, and other auxiliaries, which make the conventional Effluent treatment plant (ETP) processes (viz coagulation-flocculation followed by biodegradation process) ineffective. Advanced oxidation processes (AOPs) are one of the alternatives by which non-degradable contaminants or pollutants can be converted to less toxic or non-toxic degradable by-products with the use of highly reactive oxidative species. Electron beam treatment is one of the AOPs that uses accelerated electrons to form highly reactive species when applied to water without using any other chemical. The present work aims to study the effectiveness of electron beam treatment in the degradation of pollutants in wastewater produced by the textile industry. Accordingly, two process house samples (Separate Dyeing and Printing process) and each section of ETP samples were collected from the textile industry and applied by electron beam treatment. The e-beam treatment was carried out at the Electron Beam Center (EBC), Kharghar, Navi Mumbai, with the beam energy 10 MeV RF Accelerator. Initially, a 10 kGy e-beam dose was applied over all collected samples and analyzed for changes in visual color, pH, and COD. Irradiation with 10 kGy alone was found to be effective for the removal of color from dyeing effluent and incoming effluent to ETP, however, no significant reduction was observed in COD values. Thereafter a variable dose (0–100 kGy) of e-beam treatment was conducted over equalization tank effluent at variable pH to study its effect on the impact of e-beam treatment. These results indicate that e-beam treatment's impact is more favorable in alkaline conditions in reducing COD. Furthermore, biodegradability enhancement towards industrial effluent sample was examined by applying low doses of e-beam treatment in terms of BOD/COD ratio and by experiment e-beam followed by biodegradation through activated sludge process. It suggests that the 2 kGy e-beam dose followed by the biodegradation process results in a faster reduction in COD than the biological treatment alone.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112567"},"PeriodicalIF":2.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072496","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}

{"title":"Determination of self-attenuation correction factors for 3′′×3′′ NaI(Tl) detector by using Monte Carlo Code FLUKA","authors":"Hakan Çetinkaya","doi":"10.1016/j.radphyschem.2025.112560","DOIUrl":"10.1016/j.radphyschem.2025.112560","url":null,"abstract":"<div><div>NaI(Tl) gamma spectroscopy systems are widely used to determine the radioactivity level of the environmental samples. It is important to calculate the correct activity of environmental samples with respect to the calibration source. An activity correction is required when the density or absorption coefficient of the calibration source and the environmental sample is different; this is called the self-attenuation correction factor. In this study, the <span><math><mrow><msup><mrow><mn>3</mn></mrow><mrow><mo>′</mo><mo>′</mo></mrow></msup><mo>×</mo><msup><mrow><mn>3</mn></mrow><mrow><mo>′</mo><mo>′</mo></mrow></msup></mrow></math></span> NaI(Tl) gamma spectroscopy system in our laboratory was modeled using the Monte Carlo code FLUKA. Simulation results were validated by comparing the experimental and simulation FWHM results both for disk sources alone and disk sources placed above the 1 L Marinelli beakers. Self-attenuation correction factors were calculated for 0.5 and 1 L Marinelli beakers in the <span><math><mrow><mn>238</mn><mo>.</mo><mn>6</mn><mtext>-</mtext><mn>2614</mn></mrow></math></span> keV energy range using the FLUKA code. The materials in Marinelli beakers are assumed to be air, water and <span><math><msub><mrow><mi>SiO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> in FLUKA simulations, the densities of these materials range from 0 to 2.8 <span><math><mrow><mi>g</mi><mo>/</mo><msup><mrow><mi>cm</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span>. Additionally, energy and material density dependent coefficients of the analytical self-attenuation correction factor equation for 0.5 and 1 L Marinelli beakers were also derived using the FLUKA results.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112560"},"PeriodicalIF":2.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072497","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}

{"title":"A two-dimensional correlation spectroscopic study to probe the sensitivity of functional groups of “Helixone” membranes to thermal, and irradiation treatments","authors":"Abdul Ghaffar Al Lafi,&nbsp;Hiba Dada,&nbsp;Mohammed Amer Moughrabia","doi":"10.1016/j.radphyschem.2025.112568","DOIUrl":"10.1016/j.radphyschem.2025.112568","url":null,"abstract":"<div><div>The development of the state of the art hemodialysis membranes requires advanced material characterization to understand membranes functions and ageing mechanisms. Two-dimensional correlation (2D-COS) combined with Fourier Transform Infrared (FTIR) spectroscopies were utilized to probe the changes occurring on thermal, γ-rays and ultra-violet irradiation of polysulfone (PSF)/poly vinyl pyrrolidone (PVP) dialyzer system. The results demonstrated that the sensitivity of PVP decreased in the order: UV→γ-rays <strong>→</strong>thermal treatments. In addition, among the aromatic bands at 1605, 1595, 1570, 1515, 1505, 1485, 1460 and 1420 cm⁻¹, only the bands at 1485 or 1505 cm⁻¹ increased in intensity with increasing treatment extent, and they changed after all other bands. This was attributed to the increase in molecular orientation of PSF, which occurred after the removal of PVP. Moreover, the increase in intensity for both ether and sulphone groups in all types of treatments support the occurrence of molecular orientation. Furthermore, the decrease in the intensity of aromatic bands at 1605, 1515, 1570, 1595, 1460 and 1420 cm⁻¹ implied the release of some bisphenol-A (BPA) or bisphenol-S (BPS) units. The later was shown to be more sensitive to UV- irradiation than BPA. The results indicated that the haemodialyser is expired not only due to the leaching of PVP, but also degradation of PVP and the formation of succinimide as well as yet to a lesser extent the release of some BPA and PBS units.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112568"},"PeriodicalIF":2.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072498","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}

{"title":"Heterogeneity in dose distribution in Yttrium-90 and Holmium-166 microspheres radioembolization of hepatic tumors","authors":"L.P. Da Silva ,&nbsp;E. De Paiva ,&nbsp;H. Trombini","doi":"10.1016/j.radphyschem.2025.112521","DOIUrl":"10.1016/j.radphyschem.2025.112521","url":null,"abstract":"<div><div>Nuclear medicine therapies face challenges in dosimetric control related to the patient’s anatomy, metabolism, and limitations in dose estimation methods. These challenges are amplified by the introduction of new radiopharmaceuticals and technologies, particularly in the field of theranostics. In this work, the spatial dosimetric heterogeneity generated by microspheres used in radioembolization was characterized and compared as a function of radial position in singular conformations and around clusters. The Monte Carlo simulation package PENELOPE 2014 was used to simulate absorbed doses in homogeneous liver tissue generated by the main microspheres available for treatment: glass - ⁹⁰Y, resin - ⁹⁰Y, and PLLA - ¹⁶⁶Ho. It was determined the parameters of Russel’s equation that better describe the absorbed dose per initial activity of this microspheres, updating the constants for ⁹⁰Y, and determining them to ¹⁶⁶Ho. At a radial distance of 0.77 cm from the center of the microspheres, ⁹⁰Y microspheres provide an absorbed dose per initial activity 126 times greater than ¹⁶⁶Ho microspheres. At this same depth, Y-90 absorbed dose generated by glass and resin microspheres shows a maximum difference of 4%. For clusters, an increased level of dose per initial activity was observed in the vicinity of all median clusters (around <span><math><mrow><mn>340</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> diameter). The results of this study highlight the spatial dosimetric heterogeneity and its significant dependence on the choice of microsphere type, emphasizing the considerable impact often neglected in therapeutic planning worldwide.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112521"},"PeriodicalIF":2.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072499","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}

{"title":"Feasibility study for establishing a linear and wide range neutron dosimetry field based on MNSR neutron radiography beamline","authors":"Afrouz Asgari ,&nbsp;Seyed Abolfazl Hosseini ,&nbsp;Mohammad Hosein Choopan Dastjerdi ,&nbsp;Javad Mokhtari","doi":"10.1016/j.radphyschem.2025.112562","DOIUrl":"10.1016/j.radphyschem.2025.112562","url":null,"abstract":"<div><div>This study investigated the possibility of establishing a linear neutron dosimetry field by using reactor power changes at the Isfahan miniature neutron source reactor (MNSR). In this way, the linear response of the instrument indicating the reactor power has been assessed using reactor power changes. The linear response of the instrument indicating the reactor power, i.e., the fission chamber (FC) neutron detectors in the reactor core, was investigated experimentally using out-of-core dosimetry by both active and passive dosimeters. The results showed that the FC neutron detectors used in MNSR displayed a linear and consistent response in indicating a power range of 1.5 W–30 kW that is equal to the neutron dose range from 0.5 μSv/h to 9.5 mSv/h at the outlet of the neutron beamline. Consequently, it can be concluded that the MNSR beamline is suitable for establishing a linear and wide dosimetry field.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112562"},"PeriodicalIF":2.8,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072504","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}

{"title":"Fano test, clinical proton beams and nuclear reactions","authors":"J.A. de la Torre ,&nbsp;A.M. Lallena ,&nbsp;M. Anguiano","doi":"10.1016/j.radphyschem.2025.112538","DOIUrl":"10.1016/j.radphyschem.2025.112538","url":null,"abstract":"<div><h3>Purpose</h3><div>: A Fano test is implemented to prove the feasibility of the Monte Carlo simulation codes <span>penh</span>, <span>fluka</span> and <span>topas</span> for proton transport and, in particular, for the calculation of perturbation factors in ionization chambers used in proton-therapy. Optimal simulation parameters have been determined for <span>penh</span> and revised for <span>topas</span> and <span>fluka</span>.</div></div><div><h3>Methods</h3><div>: Simulations of proton beams with initial energies between 50 and <span><math><mrow><mn>250</mn><mspace></mspace><mspace></mspace><mi>MeV</mi></mrow></math></span> have been performed. Fano test has been checked by locally absorbing secondary particles and switching off nuclear reactions. Particular attention has been paid to the role of the tracking parameters in the verification of the test. Results obtained in previous works have been revisited. The role of radiation production and nuclear reactions has been also investigated.</div></div><div><h3>Results</h3><div>: The results obtained for different materials conforming the simulation phantom indicate that <span>penh</span> verifies the test if the key parameter <span><math><msub><mrow><mi>W</mi></mrow><mrow><mi>cc</mi></mrow></msub></math></span> takes values of <span><math><mrow><mn>10</mn><mspace></mspace></mrow></math></span>keV at most: in this case other tracking parameters do not affect these findings. <span>fluka</span> verifies the test in all the cases analyzed. <span>topas</span> fails to accomplish the Fano test for initial proton energies larger than <span><math><mrow><mn>100</mn><mspace></mspace><mspace></mspace><mi>MeV</mi></mrow></math></span>, even if the optimal values of different tracking parameters suggested in previous publications are used. Nuclear reactions are responsible of most of the radiation yield produced; this yield makes the test to be violated in the three codes.</div></div><div><h3>Conclusions</h3><div>: The Fano test has permitted to establish the optimal values for the tracking parameters in case of <span>penh</span>. Using these values <span>penh</span> verifies the test in all cases studied. <span>topas</span> does not verify it for high initial proton energies, irrespective of the combinations of tracking parameters used.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112538"},"PeriodicalIF":2.8,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072501","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}

{"title":"Improving optical, structural, mechanical and radiation shielding properties for B2O3–Er2O3 glasses: BaO and PbO2 effects","authors":"M.I. Sayyed ,&nbsp;Awatif Alshamari ,&nbsp;M.H.A. Mhareb","doi":"10.1016/j.radphyschem.2025.112565","DOIUrl":"10.1016/j.radphyschem.2025.112565","url":null,"abstract":"<div><div>This investigation explored the effects of substituting B₂O₃ with BaO and PbO₂ on the optical, mechanical, and radiation attenuation characteristics of a quaternary glass system comprising BaO, PbO₂, Er₂O₃, and B₂O₃. The codes used for the glasses are Ba20Er2, Ba22Er2, Ba24Er2, and Ba26Er2, corresponding to the BaO and PbO₂ contents. The absorption spectra was used to determine the optical features, with the mechanical properties defined according to the Makishima and Mackenzie model. The Phy-X software was used to evaluate the prepared glasses' radiation shielding properties across the 0.015–15 MeV energy range. The Ba22Er2 glass's mass attenuation coefficient (MAC) is 58.403, 6.216, 0.974, 0.064, and 0.035 cm²/g at 0.015, 0.050, 0.150, 1, and 5 MeV, respectively. The results demonstrated that higher amounts of BaO and PbO₂ in the glass system result in a greater MAC across all energy levels. The effective atomic number values follow the order Ba20Er2 &lt; Ba22Er2 &lt; Ba24Er2 &lt; Ba26Er2, indicating that BaO, PbO₂, and Er₂O₃ addition increases the glasses' radiation shielding performance. For all glasses, the half-value layer (HVL) is low at 0.015 MeV (range: 0.002–0.003 cm) and increases with rising energy, reaching 1.129–1.330 cm at 0.5 MeV and varying between 3.765 and 4.445 cm at 6 MeV. The Ba26Er2 glass exhibits the smallest HVL, while the Ba20Er2 glass has the largest, indicating that increasing the BaO and PbO₂ content reduces the thickness necessary for a 50% attenuation of the incoming radiation. Adding BaO and PbO₂ instead of B₂O₃ lowered the mechanical parameters. For instance, the young modulus for Ba20Er2, Ba22Er2, Ba24Er2, and Ba26Er2 are 83.626, 80.723, 77.831, and 74.939 GPa, respectively. Also, there was a 2.977 to 2.866 eV band gap value reduction for Ba20Er2 and Ba26Er2. Finally, it can be concluded that the shielding properties for current glasses are enhanced by adding PbO₂ and BaO, with the glass stability reduced.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"230 ","pages":"Article 112565"},"PeriodicalIF":2.8,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072500","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}