Pub Date : 2026-02-09DOI: 10.1016/j.radphyschem.2026.113709
V.A. Zagaynov, М.Е. Vasyanovich, A.A. Lushnikov, I.E. Agranovski, A.A. Maslov, V.V. Maksimenko, V. Nagibin, V. Krivosheev, D.K. Zagaynov
The paper develops a model of the process of radioactive impurities deposition on aerosol particles of various sizes. For this purpose, the following problem was solved; aerosol particles are introduced into a gas system in which there is a source of radioactivity and radioactive atoms are uniformly distributed over space. It is assumed that when these radioactive atoms collide with particles, these atoms are deposited on the particles and transfer their activity to them. These processes lead to the distribution of the radioactive impurity on the particles. To find this distribution function, a system of differential equations describing the process was solved by introduction generation function. The characteristic times for the systems to reach the stationary regime were determined, and the distributions for the stationary regime were obtained. To illustrate the results obtained, an example for monodisperse aerosol particles that collide with radioactive atoms with the same decay constant has been discussed. At the same time the distribution function was obtained by numerical methods. Numerical and exact solutions are coincided. It must also be noted that the problem can be generalized to particles with a polydisperse distribution and to a system of atoms with different decay constants using numerical solution. The proposed method can be used both for radioactive systems operating in normal mode and for emergency situations.
{"title":"Deposition of radioactive admixture on aerosol nano particles","authors":"V.A. Zagaynov, М.Е. Vasyanovich, A.A. Lushnikov, I.E. Agranovski, A.A. Maslov, V.V. Maksimenko, V. Nagibin, V. Krivosheev, D.K. Zagaynov","doi":"10.1016/j.radphyschem.2026.113709","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113709","url":null,"abstract":"The paper develops a model of the process of radioactive impurities deposition on aerosol particles of various sizes. For this purpose, the following problem was solved; aerosol particles are introduced into a gas system in which there is a source of radioactivity and radioactive atoms are uniformly distributed over space. It is assumed that when these radioactive atoms collide with particles, these atoms are deposited on the particles and transfer their activity to them. These processes lead to the distribution of the radioactive impurity on the particles. To find this distribution function, a system of differential equations describing the process was solved by introduction generation function. The characteristic times for the systems to reach the stationary regime were determined, and the distributions for the stationary regime were obtained. To illustrate the results obtained, an example for monodisperse aerosol particles that collide with radioactive atoms with the same decay constant has been discussed. At the same time the distribution function was obtained by numerical methods. Numerical and exact solutions are coincided. It must also be noted that the problem can be generalized to particles with a polydisperse distribution and to a system of atoms with different decay constants using numerical solution. The proposed method can be used both for radioactive systems operating in normal mode and for emergency situations.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"1 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146249","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 : 2026-02-09DOI: 10.1016/j.radphyschem.2026.113687
O.E. Ziada, M.S. Meikhail, A.M. Abdelghany
Introduced work addresses the research gap concerning the structural role and radiation-shielding influence of Nd2O3 within multi-component borophosphate glasses, which are promising candidates for lead-free, transparent radiation shielding. A series of glasses with composition (35-x)B2O3-30Na2O-30P2O5-5Bi2O3-xNd2O3 (where x = 0, 0.1, 0.25, 0.5, 0.75, 1 mol%) were synthesized via the melt-quenching technique at 1100°C. Their amorphous nature was confirmed by XRD, while FTIR spectroscopy coupled with deconvolution analysis was employed to probe structural modifications. Physical properties, including density, molar volume, and oxygen packing density, were measured experimentally. Gamma-ray and neutron shielding parameters were comprehensively evaluated over 0.015–15 MeV using the Phy-X/PSD software. The results reveal a consistent densification of the glass network with Nd2O3 addition: density increased from 2.82 to 3.02 g·cm-3, while molar volume decreased from 38.596 to 36.924 cm3·mol-1. The fraction of four-coordinated boron (N4) remained nearly constant (∼0.83–0.84), indicating Nd2O3 acts primarily as a modifier without disrupting the established boron coordination equilibrium. Significant improvements in radiation shielding were observed: the linear attenuation coefficient at 0.015 MeV rose from 72.8 to 82.3 cm-1, and the half-value layer at 15 MeV decreased from 9.154 to 8.368 cm. The fast neutron removal cross-section also increased from 0.0930 to 0.0978 cm-1 with Nd2O3 doping. Results reveal that Nd2O3 incorporation enhances glass compactness and radiation attenuation without inducing major structural reorganization. The sample with 1 mol% Nd2O3 (Nd1) exhibited the most promising shielding performance, combining high density, low photon penetration, and effective neutron attenuation. These findings provide a clear structure–property relationship essential for designing efficient, non-toxic, and transparent radiation shielding glasses for medical, industrial, and nuclear applications.
{"title":"Structural modification and enhanced radiation shielding in Nd2O3-doped borophosphate glasses: A combined FTIR, density, and Phy-X/PSD analysis","authors":"O.E. Ziada, M.S. Meikhail, A.M. Abdelghany","doi":"10.1016/j.radphyschem.2026.113687","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113687","url":null,"abstract":"Introduced work addresses the research gap concerning the structural role and radiation-shielding influence of Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> within multi-component borophosphate glasses, which are promising candidates for lead-free, transparent radiation shielding. A series of glasses with composition (35-<ce:italic>x</ce:italic>)B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>-30Na<ce:inf loc=\"post\">2</ce:inf>O-30P<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">5</ce:inf>-5Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>-<ce:italic>x</ce:italic>Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> (where <ce:italic>x</ce:italic> = 0, 0.1, 0.25, 0.5, 0.75, 1 mol%) were synthesized via the melt-quenching technique at 1100°C. Their amorphous nature was confirmed by XRD, while FTIR spectroscopy coupled with deconvolution analysis was employed to probe structural modifications. Physical properties, including density, molar volume, and oxygen packing density, were measured experimentally. Gamma-ray and neutron shielding parameters were comprehensively evaluated over 0.015–15 MeV using the Phy-X/PSD software. The results reveal a consistent densification of the glass network with Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> addition: density increased from 2.82 to 3.02 g·cm<ce:sup loc=\"post\">-3</ce:sup>, while molar volume decreased from 38.596 to 36.924 cm<ce:sup loc=\"post\">3</ce:sup>·mol<ce:sup loc=\"post\">-1</ce:sup>. The fraction of four-coordinated boron (N<ce:inf loc=\"post\">4</ce:inf>) remained nearly constant (∼0.83–0.84), indicating Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> acts primarily as a modifier without disrupting the established boron coordination equilibrium. Significant improvements in radiation shielding were observed: the linear attenuation coefficient at 0.015 MeV rose from 72.8 to 82.3 cm<ce:sup loc=\"post\">-1</ce:sup>, and the half-value layer at 15 MeV decreased from 9.154 to 8.368 cm. The fast neutron removal cross-section also increased from 0.0930 to 0.0978 cm<ce:sup loc=\"post\">-1</ce:sup> with Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> doping. Results reveal that Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> incorporation enhances glass compactness and radiation attenuation without inducing major structural reorganization. The sample with 1 mol% Nd<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> (Nd1) exhibited the most promising shielding performance, combining high density, low photon penetration, and effective neutron attenuation. These findings provide a clear structure–property relationship essential for designing efficient, non-toxic, and transparent radiation shielding glasses for medical, industrial, and nuclear applications.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"6 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146248","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 : 2026-02-09DOI: 10.1016/j.radphyschem.2026.113704
Q.M. Xu, X.Z. Tang, L. Zhang, Z.Y. Hong, J. Gou, Y. Song, W. Cheng, G.X. Wang, S.Y. Liu, K.K. Ding, C.H. Zhang
Titanium dioxide (TiO2) is a very promising photoelectric material. The research on its optical properties and energy levels is of great significance. Radiation-induced luminescence has been used to study the photon-emission mechanism and its energy levels. The emission spectra from TiO2 single crystals and doped TiO2:X (Cr, Fe) ceramics induced by 479 MeV Xe29+ ion irradiation at room temperature are obtained. In the spectrum, the multi-peak Gaussian fitting results are in agreement with the calculated energy levels. In the spectra from TiO2 single crystals, the emission band at 2.24 eV from the transition of Γ5→Γ3 in the conduction band, and other bands at 1.91, 1.75, 1.64, and 1.53 eV from the energy level in the valence band, are observed. The results show that the electrons undergo cascade transitions, resulting in photon emission. The emission spectra of TiO2:X ceramics are related to the doping elements. The results indicate that the mechanism of ion radiation-induced luminescence is different from photoluminescence.
{"title":"Mechanism of Photon Emission from TiO2 Irradiated by Swift Heavy Ion","authors":"Q.M. Xu, X.Z. Tang, L. Zhang, Z.Y. Hong, J. Gou, Y. Song, W. Cheng, G.X. Wang, S.Y. Liu, K.K. Ding, C.H. Zhang","doi":"10.1016/j.radphyschem.2026.113704","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113704","url":null,"abstract":"Titanium dioxide (TiO<ce:inf loc=\"post\">2</ce:inf>) is a very promising photoelectric material. The research on its optical properties and energy levels is of great significance. Radiation-induced luminescence has been used to study the photon-emission mechanism and its energy levels. The emission spectra from TiO<ce:inf loc=\"post\">2</ce:inf> single crystals and doped TiO<ce:inf loc=\"post\">2</ce:inf>:X (Cr, Fe) ceramics induced by 479 MeV Xe<ce:sup loc=\"post\">29+</ce:sup> ion irradiation at room temperature are obtained. In the spectrum, the multi-peak Gaussian fitting results are in agreement with the calculated energy levels. In the spectra from TiO<ce:inf loc=\"post\">2</ce:inf> single crystals, the emission band at 2.24 eV from the transition of Γ<ce:inf loc=\"post\">5</ce:inf>→Γ<ce:inf loc=\"post\">3</ce:inf> in the conduction band, and other bands at 1.91, 1.75, 1.64, and 1.53 eV from the energy level in the valence band, are observed. The results show that the electrons undergo cascade transitions, resulting in photon emission. The emission spectra of TiO<ce:inf loc=\"post\">2</ce:inf>:X ceramics are related to the doping elements. The results indicate that the mechanism of ion radiation-induced luminescence is different from photoluminescence.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"39 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146246","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 : 2026-02-08DOI: 10.1016/j.radphyschem.2026.113705
Po-Wen Fang, Kah-Yeen Lim, Rong-Jiun Sheu
{"title":"Systematic investigation of the shielding performance of 26 types of concrete in three accelerator radiation environments: an 18-MeV proton medical cyclotron, a 250-MeV proton therapy machine, and a 400-MeV/u carbon-ion therapy machine","authors":"Po-Wen Fang, Kah-Yeen Lim, Rong-Jiun Sheu","doi":"10.1016/j.radphyschem.2026.113705","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113705","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"59 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138540","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 : 2026-02-08DOI: 10.1016/j.radphyschem.2026.113707
Zübeyde ÖZKAN, Seda GÜRGEN AVŞAR, Uğur GÖKMEN, Sema BİLGE OCAK
{"title":"Enhanced Radiation Shielding and Damage Resistance of AA6061 Reinforced with TiB2: A Phy-X/PSD and SRIM/TRIM Analysis","authors":"Zübeyde ÖZKAN, Seda GÜRGEN AVŞAR, Uğur GÖKMEN, Sema BİLGE OCAK","doi":"10.1016/j.radphyschem.2026.113707","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113707","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"31 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138538","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":"Unveiling the gamma rays attenuation mechanism in Szaibelyite ore-based shielding composites: The limiting role of low atomic number elements","authors":"Mengge DONG, Suying ZHOU, Haofei ZHOU, G. Lakshminarayana, M.I. Sayyed, Xiangxin XUE","doi":"10.1016/j.radphyschem.2026.113692","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113692","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"42 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134646","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 : 2026-02-07DOI: 10.1016/j.radphyschem.2026.113674
Anoud Saud Alshammari, U. Rilwan, Feras Alafer, M.F.S.H. AL-Kamali, Aml Almutery, Atef El-Taher
{"title":"A Comparative analysis of radiation shielding character in engineered bricks blended with CaO, Al2O3, and Fe2O3 additives: thermal stability and Phy-X simulation insights into attenuation characteristics.","authors":"Anoud Saud Alshammari, U. Rilwan, Feras Alafer, M.F.S.H. AL-Kamali, Aml Almutery, Atef El-Taher","doi":"10.1016/j.radphyschem.2026.113674","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113674","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"31 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134647","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 : 2026-02-07DOI: 10.1016/j.radphyschem.2026.113694
Nikita Medvedev
{"title":"Resistance of refractory high-entropy alloys to ultrafast laser irradiation","authors":"Nikita Medvedev","doi":"10.1016/j.radphyschem.2026.113694","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.113694","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"34 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134645","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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