Radiation Physics and Chemistry最新文献

{"title":"The Alkaline-earth modified bismuth telluro-borate glasses for advanced multifunctional shielding applications","authors":"T. Gayathri, K.A. Naseer, K.A. Mahmoud, M. Vijayakumar, G. Muralidharan, Mohammed S. Alqahtani, K. Marimuthu","doi":"10.1016/j.radphyschem.2025.113110","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113110","url":null,"abstract":"The present study explores the radiation shielding investigations on Alkaline-earth (AE) incorporated Bismuth telluro-borate glasses prepared following the melt quenching process. A series of pristine quintet glasses with different oxide(s) and fluoride(s) modifiers were prepared with the glass composition (in wt%) of 64B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>+20Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>+15TeO<ce:inf loc=\"post\">2</ce:inf>+1Eu<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> &amp; 49B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> +20Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>+ 15TeO<ce:inf loc=\"post\">2</ce:inf> +15M+1Eu<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> (where M= SrF, SrO, BaF and BaO). XRD, FTIR, UV-Vis-NIR spectroscopy and Phys-X software have been used to examine the impact of modifiers on the structural and shielding properties. The XRD pattern confirms the glassy character of the samples, whereas the FTIR analysis explore the interior structural unit changes. The physical and structural traits of the glasses were successfully estimated, thus reveal the nature of the glass, including the presence of BOs and NBOs. Additionally, elastic properties were calculated to assess the suitability of the samples as promising materials for attenuation. The radiation shielding performance for the prepared glasses is estimated employing the Phys-X software. Additionally, the calculated shielding performance was affirmed by the Monte Carlo simulation method over the energy interval of 0.015–15 MeV. The evaluation shows the high shielding performance of the prepared glasses compared to the commercial radiation-protective lead-based glasses supplied by Schott AG. Among the prepared glasses, BaO modifier incorporated Bismuth telluro-borate glasses exhibit higher LAC (1.929 cm<ce:sup loc=\"post\">−1</ce:sup> at 0.2 MeV), Z<ce:inf loc=\"post\">eq</ce:inf> (51.317–28.456 at 1.5–15 Mev). It also has lower EBF (53.228 at 2 MeV), and EABF (59.268 at 2 MeV) signifying the enhanced capability of radiation attenuation behavior hence BBTE:BaO glass is optimum for multifunctional shielding applications.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"10 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503943","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":"Color-Tunable Luminescence in Eu3+/Tb3+ Co-Doped Tellurite Glass: Insights into Energy Transfer Mechanisms","authors":"R. Ruamnikhom, P. Yasaka, W. Wongwan, W. Thanyaphirak, A. Angnanon, N. Intachai, S. Kothan, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113103","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113103","url":null,"abstract":"This study investigates the luminescence and physical properties of tellurite-based glass co-doped with europium (Eu<ce:sup loc=\"post\">3+</ce:sup>) and terbium (Tb<ce:sup loc=\"post\">3+</ce:sup>) ions. The glass composition, 30TeO<ce:inf loc=\"post\">2</ce:inf> : 20B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> : (20 - x)SiO<ce:inf loc=\"post\">2</ce:inf> : 10Na<ce:inf loc=\"post\">2</ce:inf>O : 15BaO : 5Tb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> : xEu<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>, was synthesized via a melting process at 1100 °C followed by annealing at 500 °C for 3 hours. The optical characterization included absorption spectra, photoluminescence under 378 nm excitation, where a quenching effect was observed at 5.0 mol% Eu<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>, significantly influencing the emission intensity and suggesting an optimal doping concentration for enhanced performance, and Commission Internationale de l'Éclairage (CIE) 1931 colorimetric analysis. Lifetime measurements were conducted to explore decay kinetics, while an energy transfer efficiency model highlighted the interaction dynamics between Tb<ce:sup loc=\"post\">3+</ce:sup> and Eu<ce:sup loc=\"post\">3+</ce:sup> ions. The Energy transfer efficiency showcases promising results for applications in photonics. This work provides insights into the synergistic effects of rare-earth co-doping on the luminescence behavior of tellurite-based glasses.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"652 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503944","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":"\"Impact of interpolated grid size on gamma passing rates in 2D and 3D fluence analysis for patient-specific quality assurance\"","authors":"M.P. Arun Krishnan, A.T. Bhagyalakshmi, Jianping Hu, M Ummal Momeen","doi":"10.1016/j.radphyschem.2025.113098","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113098","url":null,"abstract":"This study investigates the effect of interpolation grid size (IGS) on gamma passing rates (GPR) in 2D and 3D gamma analysis for patient-specific quality assurance (PSQA) in volumetric modulated arc therapy (VMAT) for early-stage head and neck squamous cell carcinoma of the tongue. The objective is to determine the optimal IGS for achieving reliable and clinically acceptable GPR under different gamma criteria.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"2 3 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503947","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":"Microwave Synthesized Eu3+ Ion Phosphor-in-Glass: A Novel Scintillation Material with Enhanced Luminescence","authors":"P. Yasaka, W. Wongwan, K. Boonin, N. Intachai, S. Kothan, A. Angnanon, N. Wongdamnern, T. Sareein, N. Triamnak, N. Kamjam, P. Kanjanaboos, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113106","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113106","url":null,"abstract":"The Gd<ce:inf loc=\"post\">2</ce:inf>MoO<ce:inf loc=\"post\">6</ce:inf>:Eu<ce:sup loc=\"post\">3+</ce:sup> phosphor-in TeO<ce:inf loc=\"post\">2</ce:inf>: ZnO: BaO glass by microwave synthesized technique at different weights of phosphors (0.00, 2.50, 5.00, 7.50 and 10 wt%). The prepared samples were characterized through XRD, SEM, Raman, density, refractive index, absorption spectra, photoluminescence properties, and X-ray-induced luminescence. Crystalline structure was studied and compared with the Gd<ce:inf loc=\"post\">2</ce:inf>MoO<ce:inf loc=\"post\">6</ce:inf> standard by using a Shimadzu XRD-6100 diffractometer. Absorption spectra were evaluated in the wavelength region between 400 and 2300 nm and found four peaks, which corresponded with the transitions of Eu<ce:sup loc=\"post\">3+</ce:sup> ion from <ce:sup loc=\"pre\">7</ce:sup>F<ce:inf loc=\"post\">0</ce:inf> (ground state) → <ce:sup loc=\"pre\">5</ce:sup>D<ce:inf loc=\"post\">2</ce:inf>, <ce:sup loc=\"pre\">5</ce:sup>D<ce:inf loc=\"post\">1</ce:inf>, <ce:sup loc=\"pre\">7</ce:sup>F<ce:inf loc=\"post\">6</ce:inf> and <ce:sup loc=\"pre\">7</ce:sup>F<ce:inf loc=\"post\">1</ce:inf>→<ce:sup loc=\"post\">7</ce:sup>F<ce:inf loc=\"post\">6</ce:inf> at 464, 534, 2088 and 2203 nm respectively. Photoluminescence was recorded in the wavelength region of 550-725 nm using an excitation wavelength of 395 nm. The emission intensity of the prepared samples increased with the increasing weight of Gd<ce:inf loc=\"post\">2</ce:inf>MoO<ce:inf loc=\"post\">6</ce:inf>:Eu<ce:sup loc=\"post\">3+</ce:sup> phosphor. The Photoluminescence quantum yield of the highest intensity sample is 9.34 %. The luminescence lifetime from the <ce:sup loc=\"pre\">7</ce:sup>F<ce:inf loc=\"post\">0</ce:inf> → <ce:sup loc=\"pre\">5</ce:sup>D<ce:inf loc=\"post\">2</ce:inf> state decreased with increasing weight of phosphors, which had a lifetime of 0.993, 0.987, 0.998, and 0.981 ms respectively when monitored at λ<ce:inf loc=\"post\">ex</ce:inf> = 395 nm. In addition, the X-ray-induced luminescence study showed that the intensity of the sample increases with increasing phosphor concentration. The results obtained in X-ray-induced luminescence found that the samples could be potential candidates for reddish-orange light-emitting for scintillation applications.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"645 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504016","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":"Radiation protective windows for industrial and medical applications: Whole body and human organs dose estimation","authors":"W. Cheewasukhanont, S. Kothan, N. Intachai, Y. Ruangtaweep, C. Mutuwong, K. Kirdsiri, H.J. Kim, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113105","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113105","url":null,"abstract":"This study reports the development and evaluation of Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> doped soda-lime-silicate glass systems (B1-B4) as potential transparent radiation shielding materials. The physical and optical properties of the glasses were characterized through experimental measurements. The total mass attenuation coefficients <ce:math altimg=\"si1.svg\"></ce:math>) were obtained experimentally using the Compton scattering technique and compared with theoretical values and simulations from WinXCom and the PHITS Monte Carlo methods, including X-ray shielding simulations in which the absorption spectrum was modeled using the PHITS program. The results found that increasing Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> content enhanced the density, refractive index, <ce:math altimg=\"si2.svg\"></ce:math>, effective atomic number (<ce:italic>Z</ce:italic><ce:inf loc=\"post\"><ce:italic>eff</ce:italic></ce:inf>), and electron density (<ce:italic>N</ce:italic><ce:inf loc=\"post\"><ce:italic>eff</ce:italic></ce:inf>), while reducing the half-value layer (HVL), confirming improved attenuation capacity and shielding performance. Energy absorption and exposure buildup factors (EABF and EBF) were also analyzed, showing that higher Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> concentration effectively minimized scattered photon buildup. Monte Carlo simulations (PHITS) validated the shielding capability, with the B1 sample reducing organ doses for example, a 12.96% reduction in the ascending colon. Among all compositions, B1 demonstrated the most balanced between radiation protection and optical transmittance and was the only sample successfully fabricated into a large-scale glass panel. As a result, B1 is a viable lead-free alternative for radiation shielding windows in medical and industrial settings, combining effectiveness, transparency, and manufacturability.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"14 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504017","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":"SHI irradiation molecular and microstructural changes in [formula omitted] due to SHI irradiation","authors":"Ashish K. Kumawat, Ambuj Mishra, Indra Sulania, Satyapal S. Rathore, Rashi Nathawat","doi":"10.1016/j.radphyschem.2025.113079","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113079","url":null,"abstract":"Swift heavy ion beam irradiation is a highly efficient method for introducing defects into a material system, thereby facilitating functional property modification. In this study, &lt;mml:math altimg=\"si8.svg\" display=\"inline\"&gt;&lt;mml:mrow&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mo&gt;(&lt;/mml:mo&gt;&lt;mml:mi&gt;P&lt;/mml:mi&gt;&lt;mml:mi&gt;A&lt;/mml:mi&gt;&lt;mml:mi&gt;N&lt;/mml:mi&gt;&lt;mml:mi&gt;I&lt;/mml:mi&gt;&lt;mml:mo&gt;)&lt;/mml:mo&gt;&lt;/mml:mrow&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;2&lt;/mml:mn&gt;&lt;mml:mo&gt;.&lt;/mml:mo&gt;&lt;mml:mn&gt;5&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\"&gt;−&lt;/mml:mo&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mo&gt;(&lt;/mml:mo&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;V&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;4&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;O&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;7&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;mml:mo&gt;)&lt;/mml:mo&gt;&lt;/mml:mrow&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;7&lt;/mml:mn&gt;&lt;mml:mo&gt;.&lt;/mml:mo&gt;&lt;mml:mn&gt;5&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt; polyaniline-vanadium pentoxide composites were synthesized via a hydrothermal method. They Subsequently underwent irradiation with &lt;mml:math altimg=\"si2.svg\" display=\"inline\"&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;N&lt;/mml:mi&gt;&lt;mml:msup&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;i&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mo&gt;+&lt;/mml:mo&gt;&lt;mml:mn&gt;11&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msup&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt; ions at a fluence of &lt;mml:math altimg=\"si3.svg\" display=\"inline\"&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;2&lt;/mml:mn&gt;&lt;mml:mo&gt;.&lt;/mml:mo&gt;&lt;mml:mn&gt;5&lt;/mml:mn&gt;&lt;mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\"&gt;×&lt;/mml:mo&gt;&lt;mml:mn&gt;1&lt;/mml:mn&gt;&lt;mml:msup&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;0&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;11&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msup&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;&lt;mml:math altimg=\"si4.svg\" display=\"inline\"&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;i&lt;/mml:mi&gt;&lt;mml:mi&gt;o&lt;/mml:mi&gt;&lt;mml:mi&gt;n&lt;/mml:mi&gt;&lt;mml:mi&gt;s&lt;/mml:mi&gt;&lt;mml:mo&gt;/&lt;/mml:mo&gt;&lt;mml:msup&gt;&lt;mml:mrow&gt;&lt;mml:mi mathvariant=\"normal\"&gt;cm&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;2&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msup&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;, having energy of 150 MeV. Advanced characterization techniques were then employed to analyze the structural, morphological, electronic, and optical properties of both the Pre-irradiated and post-irradiated samples. In XRD, the Bragg reflections observed were attributed to two distinct phases present in the material, indicating that the sample was pure and composed solely of the intended constituents without any impurity. The HRTEM images revealed an interatomic distance of 0.35 nm, corresponding to the (0-13) lattice plane of orthorhombic &lt;mml:math altimg=\"si5.svg\" display=\"inline\"&gt;&lt;mml:mrow&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;V&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;4&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;O&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;7&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;/mml:mrow&gt;&lt;/mml:math&gt;. Additionally, the SAED demonstrates a diffraction pattern characteristic of polycrystalline &lt;mml:math altimg=\"si5.svg\" display=\"inline\"&gt;&lt;mml:mrow&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;V&lt;/mml:mi&gt;&lt;/mml:mrow&gt;&lt;mml:mrow&gt;&lt;mml:mn&gt;4&lt;/mml:mn&gt;&lt;/mml:mrow&gt;&lt;/mml:msub&gt;&lt;mml:msub&gt;&lt;mml:mrow&gt;&lt;mml:mi&gt;O&lt;/","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"87 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503948","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":"Enhancement of the radiation shielding properties of lead-borate glass: the impacts of Sb2O3, Al2O3 and ZnO","authors":"M.I. Sayyed, K.A. Mahmoud, Chaitali V. More, Laith Ahmed Najam","doi":"10.1016/j.radphyschem.2025.113109","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113109","url":null,"abstract":"This study fabricated three glass series based on the 65B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–25PbO-10 M (M = Sb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>, Al<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>, and ZnO) formula in order to examine the impacts of various metal oxides on the gamma-ray shielding and physical properties. The study showed that among the fabricated glasses, those with 10 mol% of ZnO have the highest density of 4.543 g/cm<ce:sup loc=\"post\">3</ce:sup>, followed by glasses doped with Sb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> (4.502 g/cm<ce:sup loc=\"post\">3</ce:sup>) and Al<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> (4.377 g/cm<ce:sup loc=\"post\">3</ce:sup>). Monte Carlo simulations were employed to estimate the radiation shielding properties of the fabricated glasses. The samples' linear attenuation coefficient (μ, cm<ce:sup loc=\"post\">−1</ce:sup>) was reduced from 15.722 to 0.181 cm<ce:sup loc=\"post\">−1</ce:sup> (sample BPSb), from 11.051 to 0.178 cm<ce:sup loc=\"post\">−1</ce:sup> (sample BPAl), and from 12.098 to 0.184 cm<ce:sup loc=\"post\">−1</ce:sup> (sample BPZn) through a 0.059–2.506 MeV gamma photon energy increase, respectively. This LAC reduction is attributable to the density and electron density of the doping metal oxides, with an increase in the fabricated samples' half-value thickness also occurring, which at 0.059 MeV is 0.044 cm, 0.063 cm, and 0.057 cm for samples BPSb, BPAl, and BPZn, respectively. Meanwhile, an increase to 2.506 MeV leads the half-value thickness to rise to 3.831 cm, 3.902 cm, and 3.758 cm. The study showed that the fabricated glasses, especially BPAl and BPSb glasses, have better shielding properties against low and intermediate gamma-photons.‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"27 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504018","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":"Radiation attenuation properties of spinel ferrite nanostructures for biomedical applications: A comparative Monte Carlo simulation analysis","authors":"Hasan Özdoğan, Gençay Sevim, Özge Kılıçoğlu, Yiğit Ali Üncü","doi":"10.1016/j.radphyschem.2025.113108","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113108","url":null,"abstract":"This study investigates the photon interaction properties, mass attenuation coefficients (MAC), and radiation attenuation efficiency of NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>, CoFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>, and MnFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> spinel ferrite nanostructures for biomedical applications. Through simulations using MCNP6, and PHITS, NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> exhibited the highest mass attenuation coefficient (MAC) and linear attenuation coefficient (LAC) across photon energy levels, confirming its superior photon attenuation capabilities. The simulation results were also compared with WinXCom data to validate their consistency and accuracy. The study further analyzed half-value layers (HVL) and tenth-value layers (TVL), critical for radiation shielding, with NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> showing the lowest HVL and TVL values, indicating enhanced efficiency. At 0.015 MeV, NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> showed the most favorable attenuation metrics, including a MAC of 45.4400 cm<ce:sup loc=\"post\">2</ce:sup>/g, LAC of 243.1040 cm<ce:sup loc=\"post\">−1</ce:sup>, HVL of 0.0029 cm, and TVL of 0.0095 cm. The mean free path (MFP) and effective atomic number (Zeff) trends align with these results, where NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> consistently demonstrated the shortest MFP and highest Z<ce:inf loc=\"post\">eff</ce:inf>, reinforcing its suitability for medical imaging and targeted therapeutic applications. Moreover, exposure buildup factors (EBF) and energy absorption buildup factors (EABF) were lowest for NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>, reflecting an inverse relationship between Zeq and these values, enhancing its radiation shielding potential. Mass stopping power (MSP) and projected range (PR) analyses using SRIM highlighted NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>'s effectiveness in attenuating both alpha particles and protons, with minimal stopping power and range. These findings underline NiFe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>'s advantages in photon and charged particle attenuation, suggesting its high potential as a nanomaterial for imaging, radiation therapy, and other biomedical uses.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"9 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504019","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":"Study on the impact of different wound dressings on surface dose and deep dose analysis in head and neck radiation therapy","authors":"Hsiao-Ju Fu, Chih-Chia Chang, Yuk-Wah Tsang, De-Shin Liu","doi":"10.1016/j.radphyschem.2025.113071","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113071","url":null,"abstract":"Wound dressings are essential for managing skin reactions in patients who have undergone treatments lasting over three to four weeks preventing the progression to more severe wounds, particularly when frequent dressing changes are necessary. However, the use of wound dressings can influence surface radiation doses in the treatment area. This study aimed to evaluate the dosimetric impact of two commonly used hydrocolloid dressings—Aquacel® Ag+ Extra™ (Aquacel-Ag) and DuoDERM® CGF® (DuoDERM)—on surface and near-surface doses in head and neck radiotherapy using IMRT and VMAT techniques. Surface dose measurements were performed using a Markus parallel plate ionization chamber and EBT3 film on both polystyrene slabs and a head-and-neck (HN) IMRT verification phantom. Field sizes of 5×5, 10×10, and 15×15 cm<ce:sup loc=\"post\">2</ce:sup> were investigated. Dressing thicknesses were 0.47 mm (Aquacel-Ag) and 2 mm (DuoDERM). Paired sample t-tests were conducted to evaluate dose differences between no dressing, Aquacel-Ag, and DuoDERM, including analysis of D<ce:inf loc=\"post\">s</ce:inf>/D<ce:inf loc=\"post\">1cm</ce:inf> ratios. The calibration of the dosimeters demonstrated standard deviations within 1% for both the Markus ion chamber and EBT3 film, indicating high precision with coefficients of variation (R<ce:sup loc=\"post\">2</ce:sup> = 0.9999 and 0.9916, respectively). Both dressings increased surface dose significantly (p ≤ 0.05), with DuoDERM causing a maximum increase of 31.67% under a 5×5 cm<ce:sup loc=\"post\">2</ce:sup> field. Aquacel-Ag showed modest increases (&lt;6%) across all field sizes. In the HN phantom, DuoDERM significantly elevated surface dose and Ds/D1cm ratio under IMRT (p = 0.006), whereas Aquacel-Ag had no statistically significant impact. VMAT plans showed less dose enhancement due to the technique’s distributed angular weighting. All measured Ds/D1cm values remained within the clinically acceptable range (below 95% of the prescription dose), per ICRU Report 83. This study highlights the significant impact of hydrocolloid dressings on surface radiation doses during treatments lasting over three to four weeks. These findings emphasize the importance of considering dressing materials when planning radiation treatments to ensure accurate dose and patient safety.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"271 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503949","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":"Ionization of matter with resonating nanoantennas under intense laser irradiation — Numerical study","authors":"K. Zsukovszki, I. Papp, part of NAPLIFE Collaboration","doi":"10.1016/j.radphyschem.2025.113111","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113111","url":null,"abstract":"Ionization of matter with gold nanodopes by intense (∼10<ce:sup loc=\"post\">17</ce:sup>−10<ce:sup loc=\"post\">18</ce:sup> W/cm<ce:sup loc=\"post\">2</ce:sup>) short (0.1 ps) laser pulses is studied numerically with particle-in-cell (PIC) method; resonant crossed nanoantennas are embedded in the hydrogen-rich dense media. We model and explore the dynamics of ionization and ion energy acquisition during the radiation pulse passage in matter with nanoantenna. Influence of the field intensity on the resonance characteristics is studied to identify the optimal conditions for maximizing proton energy. The results are intended to optimize laser-driven ionization, initiate and control Laser-Induced Nanofusion (LIN) at nanoscale.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"35 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504020","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}