The peculiarities of X–ray diffraction from atomic planes of the same family in different cuts of quartz single crystals under the temperature gradient are investigated. Quartz single crystals were shaped into rectangular parallelepiped plates with X- and Z-cuts, with one heated edge oriented parallel to the (10 0) reflecting planes. The experiments were carried out using collimated polychromatic X–rays in symmetric Laue geometry. For different values of the temperature gradient applied to the crystal, both sectional topograms at different distances from the crystal and spectra of the reflected beam were obtained. The experimental results showed that the parameters of the deformation field formed at the same temperature gradient applied perpendicularly to the reflecting planes (10 0) of the crystal with different cuts are significantly different: for the same heat applied to the single crystal, the bending radius in the X–cut sample was significantly smaller than the bending radius of the Z–cut sample.
{"title":"X–ray diffraction in different crystal cuts under a temperature gradient","authors":"V.R. Kocharyan, T.G. Dovlatyan, V.V. Margaryan, Yu.M. Cherepennikov, A.E. Movsisyan, V.N. Aghabekyan, R.K. Mirzoyan, H.G. Margaryan, A.V. Shahverdyan, M.H. Mesropyan, S.N. Noreyan","doi":"10.1016/j.radphyschem.2026.113654","DOIUrl":"10.1016/j.radphyschem.2026.113654","url":null,"abstract":"<div><div>The peculiarities of X–ray diffraction from atomic planes of the same family in different cuts of quartz single crystals under the temperature gradient are investigated. Quartz single crystals were shaped into rectangular parallelepiped plates with X- and Z-cuts, with one heated edge oriented parallel to the (10 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0) reflecting planes. The experiments were carried out using collimated polychromatic X–rays in symmetric Laue geometry. For different values of the temperature gradient applied to the crystal, both sectional topograms at different distances from the crystal and spectra of the reflected beam were obtained. The experimental results showed that the parameters of the deformation field formed at the same temperature gradient applied perpendicularly to the reflecting planes (10 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0) of the crystal with different cuts are significantly different: for the same heat applied to the single crystal, the bending radius in the X–cut sample was significantly smaller than the bending radius of the Z–cut sample.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"243 ","pages":"Article 113654"},"PeriodicalIF":2.8,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014792","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 : 2026-01-20DOI: 10.1016/j.radphyschem.2026.113612
Flavie Petros , Hélène Garay , Aurélie Taguet , Belkacem Otazaghine , Rodolphe Sonnier , Nicolas Ludwig , Abbas Nasreddine , Florent Kuntz , Yves Bayon , Sophie Rouif
The global demand for sterile medical devices is increasing due to technological advancements and growing health care needs. Although Electron beam (EB) and X-ray have existed for a long time, they have been less utilized compared to other sterilization methods such as ethylene oxide and Gamma irradiation. Currently, their application is developing, offering new possibilities in response to a rapidly expanding sterilization market. This study assesses the impact of these irradiation techniques on polypropylene (PP) materials used in medical devices, focusing on their mechanical properties, structural changes, and color stability. PP is known for its sensitivity to irradiation, which makes the evaluation of its properties under different irradiation conditions particularly relevant. Three different PP grades, with varying radiotolerance claims, were exposed to controlled irradiation doses (30, 45, and 85 kGy). Analyses including electron spin resonance (ESR), rheology, tensile testing and colorimetry were carried out. They were also employed in conjunction with principal component analysis (PCA). The results allowed to evaluate irradiation-induced modification. Results indicate that Gamma irradiation induces the most significant degradation due to its low dose rate, leading to increased chain scission and oxidation effects. E-beam irradiation has the least impact, while X-ray effects are generally lower to Gamma irradiation at equivalent doses. The study highlights the importance of selecting appropriate PP formulations to ensure optimal post-irradiation performance, particularly in the context of transitioning from traditional sterilization methods to E-beam or emerging X-ray technology.
{"title":"Assessment of the impact of the irradiation process on the final properties of radiation-resistant polypropylene materials used for medical devices","authors":"Flavie Petros , Hélène Garay , Aurélie Taguet , Belkacem Otazaghine , Rodolphe Sonnier , Nicolas Ludwig , Abbas Nasreddine , Florent Kuntz , Yves Bayon , Sophie Rouif","doi":"10.1016/j.radphyschem.2026.113612","DOIUrl":"10.1016/j.radphyschem.2026.113612","url":null,"abstract":"<div><div>The global demand for sterile medical devices is increasing due to technological advancements and growing health care needs. Although Electron beam (EB) and X-ray have existed for a long time, they have been less utilized compared to other sterilization methods such as ethylene oxide and Gamma irradiation. Currently, their application is developing, offering new possibilities in response to a rapidly expanding sterilization market. This study assesses the impact of these irradiation techniques on polypropylene (PP) materials used in medical devices, focusing on their mechanical properties, structural changes, and color stability. PP is known for its sensitivity to irradiation, which makes the evaluation of its properties under different irradiation conditions particularly relevant. Three different PP grades, with varying radiotolerance claims, were exposed to controlled irradiation doses (30, 45, and 85 kGy). Analyses including electron spin resonance (ESR), rheology, tensile testing and colorimetry were carried out. They were also employed in conjunction with principal component analysis (PCA). The results allowed to evaluate irradiation-induced modification. Results indicate that Gamma irradiation induces the most significant degradation due to its low dose rate, leading to increased chain scission and oxidation effects. E-beam irradiation has the least impact, while X-ray effects are generally lower to Gamma irradiation at equivalent doses. The study highlights the importance of selecting appropriate PP formulations to ensure optimal post-irradiation performance, particularly in the context of transitioning from traditional sterilization methods to E-beam or emerging X-ray technology.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"243 ","pages":"Article 113612"},"PeriodicalIF":2.8,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014448","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}
The presence of natural and artificial radioactivity in soil requires reliable monitoring methods to ensure environmental and public safety. High Purity Germanium (HPGe) detectors remain the benchmark for gamma spectrometry, but their accuracy is influenced by factors such as sample geometry, counting duration, and self-attenuation. This study offers a straightforward way to correction self-attenuation when determining activity concentrations in bulk soil samples, using a procedure that can be applied directly without the need for simulation tools or specialized software. The correction equation incorporates key parameters namely geometry, counting time, and self-attenuation which is applicable under routine laboratory conditions using standard spreadsheet tools. Application of the method to bulk soil samples of varying geometries, measured over 3 and 24 h periods, improved the estimation of 226Ra, 232Th, and 40K activity concentrations by up to 7.3 %,8.9 % and 6.3 % respectively. Validation against using the IAEA-375 reference soil showed that the relative error decreased and the adjusted values were in good agreement with the certified data. The method offers a workable option for labs that deal with environmental radioactivity, especially when measurements are not perfectly ideal.
{"title":"Accessible self-attenuation correction method for activity concentration measurement in bulk soil using HPGe gamma spectrometry","authors":"Sahar Saleh Al-Horr , Kok Siong Khoo , Imran Yusuff","doi":"10.1016/j.radphyschem.2026.113627","DOIUrl":"10.1016/j.radphyschem.2026.113627","url":null,"abstract":"<div><div>The presence of natural and artificial radioactivity in soil requires reliable monitoring methods to ensure environmental and public safety. High Purity Germanium (HPGe) detectors remain the benchmark for gamma spectrometry, but their accuracy is influenced by factors such as sample geometry, counting duration, and self-attenuation. This study offers a straightforward way to correction self-attenuation when determining activity concentrations in bulk soil samples, using a procedure that can be applied directly without the need for simulation tools or specialized software. The correction equation incorporates key parameters namely geometry, counting time, and self-attenuation which is applicable under routine laboratory conditions using standard spreadsheet tools. Application of the method to bulk soil samples of varying geometries, measured over 3 and 24 h periods, improved the estimation of <sup>226</sup>Ra, <sup>232</sup>Th, and <sup>40</sup>K activity concentrations by up to 7.3 %,8.9 % and 6.3 % respectively. Validation against using the IAEA-375 reference soil showed that the relative error decreased and the adjusted values were in good agreement with the certified data. The method offers a workable option for labs that deal with environmental radioactivity, especially when measurements are not perfectly ideal.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113627"},"PeriodicalIF":2.8,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014455","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}
Ionizing radiation (X-rays, proton beams) causes structural changes in materials. If a vibrating metallic wire is subjected to such radiation, the natural frequency of the wire is affected as a result of changes in the elastic characteristics of the material. This paper presents the results of experiments on the impact of proton beam with energy 18 MeV on the structure of stainless steel wire. In case of proton irradiation an irreversible change in the wire frequency was observed, which indicated residual changes in the structure of the wire material. X-ray diffractometry methods were used to analyze the structural changes.
{"title":"Monitoring of structural changes in materials under the exposure of ionization radiation using a vibrating wire","authors":"S.G. Arutunian , N.M. Manukyan , S.A. Hunanyan , A.V. Margaryan , E.G. Lazareva , M. Chung , L.M. Lazarev , G.S. Harutyunyan , D.A. Poghosyan , N.B. Margaryan , N.R. Aghamalyan , M.N. Nersisyan","doi":"10.1016/j.radphyschem.2026.113651","DOIUrl":"10.1016/j.radphyschem.2026.113651","url":null,"abstract":"<div><div>Ionizing radiation (X-rays, proton beams) causes structural changes in materials. If a vibrating metallic wire is subjected to such radiation, the natural frequency of the wire is affected as a result of changes in the elastic characteristics of the material. This paper presents the results of experiments on the impact of proton beam with energy 18 MeV on the structure of stainless steel wire. In case of proton irradiation an irreversible change in the wire frequency was observed, which indicated residual changes in the structure of the wire material. X-ray diffractometry methods were used to analyze the structural changes.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113651"},"PeriodicalIF":2.8,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995414","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 : 2026-01-17DOI: 10.1016/j.radphyschem.2026.113634
G. Murtaza , Jaber M. Asiri , Hilal Ali Al Hadhrami , Majid Al-Ruqeishi , Harith Mohamed Al-Azri , Aarfa A. Yagob , Saad Alshammari
This work explores the structural, electronic, optical, and thermoelectric properties of CaCu3ScSe4 and CaCu3YSe4 using first-principles calculations and Boltzmann transport theory. Swapping Sc with Y leads to notable shifts in bonding and carrier behavior. CaCu3ScSe4 displays a slightly wider band gap, stronger covalent bonding, and increased mechanical stiffness. It also shows a higher Seebeck coefficient, suggesting better thermoelectric efficiency under n-type doping at elevated temperatures. In contrast, CaCu3YSe4 features a lower band gap and more delocalized Y–4d conduction states, which enhance electron mobility and electrical conductivity. Charge density analysis show Sc–Se bonds are more localized, while Y–Se bonds appear broader and more diffuse. Optically, both compounds absorb strongly in the visible to UV range. CaCu3ScSe4 exhibits a higher refractive index, whereas CaCu3YSe4 has a sharper absorption edge, making it more responsive at shorter wavelengths. The band-edge potentials are also calculated to assess the photocatalytic water-splitting potential. These results reveal that cation substitution in CaCu3MSe4 (M = Sc, Y) offers a tunable pathway for optimizing thermoelectric and optoelectronic performance. Strategic element selection could be key to tailoring materials for specific device applications.
{"title":"From Sc to Y in CaCu3MSe4: Bonding reorganization, band-edge alignment, and transport tunability from first principles","authors":"G. Murtaza , Jaber M. Asiri , Hilal Ali Al Hadhrami , Majid Al-Ruqeishi , Harith Mohamed Al-Azri , Aarfa A. Yagob , Saad Alshammari","doi":"10.1016/j.radphyschem.2026.113634","DOIUrl":"10.1016/j.radphyschem.2026.113634","url":null,"abstract":"<div><div>This work explores the structural, electronic, optical, and thermoelectric properties of CaCu<sub>3</sub>ScSe<sub>4</sub> and CaCu<sub>3</sub>YSe<sub>4</sub> using first-principles calculations and Boltzmann transport theory. Swapping Sc with Y leads to notable shifts in bonding and carrier behavior. CaCu<sub>3</sub>ScSe<sub>4</sub> displays a slightly wider band gap, stronger covalent bonding, and increased mechanical stiffness. It also shows a higher Seebeck coefficient, suggesting better thermoelectric efficiency under n-type doping at elevated temperatures. In contrast, CaCu<sub>3</sub>YSe<sub>4</sub> features a lower band gap and more delocalized Y–4d conduction states, which enhance electron mobility and electrical conductivity. Charge density analysis show Sc–Se bonds are more localized, while Y–Se bonds appear broader and more diffuse. Optically, both compounds absorb strongly in the visible to UV range. CaCu<sub>3</sub>ScSe<sub>4</sub> exhibits a higher refractive index, whereas CaCu<sub>3</sub>YSe<sub>4</sub> has a sharper absorption edge, making it more responsive at shorter wavelengths. The band-edge potentials are also calculated to assess the photocatalytic water-splitting potential. These results reveal that cation substitution in CaCu<sub>3</sub>MSe<sub>4</sub> (M = Sc, Y) offers a tunable pathway for optimizing thermoelectric and optoelectronic performance. Strategic element selection could be key to tailoring materials for specific device applications.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113634"},"PeriodicalIF":2.8,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995416","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}
The Ag–CeO2 nanocomposite (1.3 at. % Ag) with a specific surface area (126.5 m2/g), large pore volume (0.11 cm3/g) and relatively large Ag nanoparticles (51 ± 3 nm) was obtained using electron beams with different electron energies (from 40 to 500 keV) and investigated for the catalytic oxidation of the popular dye methyl violet (MV). Silver nitrate was used as a precursor. The deposition of Ag nanoparticles was carried out on CeO2 nanoparticles of 3–5 nm in size, previously obtained by pulsed electron beam evaporation (PEBE) in a vacuum. According to X-ray diffraction and elemental analysis using X-ray photoemission spectroscopy, there were no parasitic impurities in the synthesized product. The composite contained two cubic phases: CeO2 and Ag. TEM micrographs depicted the formation of agglomerated non-symmetrical NPs in form of 3D spatial nanostructures in the form of “clouds”. The “clouds” were constructed from CeO2 nanoparticles, smaller than 5 nm in size, which were coated with scatterings of individual and chain spherical Ag nanoparticles, ranging in size from 10 to 200 nm%. EDX spectra confirmed the presence of the main elements in the composite. XPS analysis showed that the composite contained only non-stoichiometric cerium dioxide (CeO1.8) with Ag0 NPs on the surface of the oxide NPs. The deposition of Ag nanoparticles on CeO2 nanoparticles led to an increase in the photocatalytic activity of the latter by 23 %. The stability of CeO2 aqueous suspensions was studied using Darvan-CN and sodium citrate dispersants.
{"title":"Mesoporous Ag–CeO2 nanocomposite as oxigation catalyst synthesized by various energy pulsed electron beams","authors":"V.G. Ilves , M.E. Balezin , S. Yu Sokovnin , A.S. Gerasimov , E.G. Kalinina , D.S. Rusakova , P.M. Korusenko","doi":"10.1016/j.radphyschem.2026.113638","DOIUrl":"10.1016/j.radphyschem.2026.113638","url":null,"abstract":"<div><div>The Ag–CeO<sub>2</sub> nanocomposite (1.3 at. % Ag) with a specific surface area (126.5 m<sup>2</sup>/g), large pore volume (0.11 cm<sup>3</sup>/g) and relatively large Ag nanoparticles (51 ± 3 nm) was obtained using electron beams with different electron energies (from 40 to 500 keV) and investigated for the catalytic oxidation of the popular dye methyl violet (MV). Silver nitrate was used as a precursor. The deposition of Ag nanoparticles was carried out on CeO<sub>2</sub> nanoparticles of 3–5 nm in size, previously obtained by pulsed electron beam evaporation (PEBE) in a vacuum. According to X-ray diffraction and elemental analysis using X-ray photoemission spectroscopy, there were no parasitic impurities in the synthesized product. The composite contained two cubic phases: CeO<sub>2</sub> and Ag. TEM micrographs depicted the formation of agglomerated non-symmetrical NPs in form of 3D spatial nanostructures in the form of “clouds”. The “clouds” were constructed from CeO<sub>2</sub> nanoparticles, smaller than 5 nm in size, which were coated with scatterings of individual and chain spherical Ag nanoparticles, ranging in size from 10 to 200 nm%. EDX spectra confirmed the presence of the main elements in the composite. XPS analysis showed that the composite contained only non-stoichiometric cerium dioxide (CeO<sub>1.8</sub>) with Ag<sup>0</sup> NPs on the surface of the oxide NPs. The deposition of Ag nanoparticles on CeO<sub>2</sub> nanoparticles led to an increase in the photocatalytic activity of the latter by 23 %. The stability of CeO<sub>2</sub> aqueous suspensions was studied using Darvan-CN and sodium citrate dispersants.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113638"},"PeriodicalIF":2.8,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995415","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 : 2026-01-17DOI: 10.1016/j.radphyschem.2026.113636
Sirisha Majji , M.C. Rath , Y.K. Bhardwaj
The radical-mediated degradation of the reactive azo dye Procion MX-8G (PMX-8G), a widely used persistent textile dye, in aqueous solution was investigated using a 7 MeV linear electron accelerator and pulse radiolysis. Electron beam (EB) irradiation at an absorbed dose of 10 kGy resulted in near-complete (>99 %) decolorization for 0.1 mM PMX-8G solution, as evidenced by the decrease in the absorption maximum at λmax ∼416 nm. Under controlled conditions, oxidative pathways were more effective than reductive conditions causing higher degradation. Transient absorption spectra obtained under N2O saturated condition, revealed the formation of short-lived intermediates with absorption bands near ∼350 and ∼580 nm and a bleach signal around ∼420 nm. The •OH reaction rate constant with PMX-8G was 2.5 ± 0.2 x 1010 dm3mol−1s−1. Reaction with hydrated electrons (eaq−) produced an anionic intermediate with an absorption peak at ∼500 nm, and the second-order rate constant for the reaction was 1.5 ± 0.2 × 1010 dm3mol−1s−1. The degradation studies carried out in the presence of sodium carbonate (representative of dye-fixing conditions), substantially inhibited degradation, increasing the required dose nearly threefold, for same extent of decolorization, whereas the presence of chloride caused only minor inhibition, reducing 0.15 mM PMX-8G degradation from ∼98 % to ∼92 % at 5 kGy. HRMS product analysis of fragmented dye confirmed that PMX-8G undergoes radiolytic degradation via oxidative and reductive pathways. These results demonstrate the potential of electron-beam treatment as a clean, chemical free approach for treating saline and chemically complex textile effluents.
{"title":"An insight into radiolytic degradation of Procion dye MX-8G: A pulse radiolysis investigation","authors":"Sirisha Majji , M.C. Rath , Y.K. Bhardwaj","doi":"10.1016/j.radphyschem.2026.113636","DOIUrl":"10.1016/j.radphyschem.2026.113636","url":null,"abstract":"<div><div>The radical-mediated degradation of the reactive azo dye Procion MX-8G (PMX-8G), a widely used persistent textile dye, in aqueous solution was investigated using a 7 MeV linear electron accelerator and pulse radiolysis. Electron beam (EB) irradiation at an absorbed dose of 10 kGy resulted in near-complete (>99 %) decolorization for 0.1 mM PMX-8G solution, as evidenced by the decrease in the absorption maximum at <em>λ<sub>max</sub></em> ∼416 nm. Under controlled conditions, oxidative pathways were more effective than reductive conditions causing higher degradation. Transient absorption spectra obtained under N<sub>2</sub>O saturated condition, revealed the formation of short-lived intermediates with absorption bands near ∼350 and ∼580 nm and a bleach signal around ∼420 nm. The <sup>•</sup>OH reaction rate constant with PMX-8G was 2.5 ± 0.2 x 10<sup>10</sup> dm<sup>3</sup>mol<sup>−1</sup>s<sup>−1</sup>. Reaction with hydrated electrons (e<sub>aq</sub> <sup>−</sup>) produced an anionic intermediate with an absorption peak at ∼500 nm, and the second-order rate constant for the reaction was 1.5 ± 0.2 × 10<sup>10</sup> dm<sup>3</sup>mol<sup>−1</sup>s<sup>−1</sup>. The degradation studies carried out in the presence of sodium carbonate (representative of dye-fixing conditions), substantially inhibited degradation, increasing the required dose nearly threefold, for same extent of decolorization, whereas the presence of chloride caused only minor inhibition, reducing 0.15 mM PMX-8G degradation from ∼98 % to ∼92 % at 5 kGy. HRMS product analysis of fragmented dye confirmed that PMX-8G undergoes radiolytic degradation via oxidative and reductive pathways. These results demonstrate the potential of electron-beam treatment as a clean, chemical free approach for treating saline and chemically complex textile effluents.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113636"},"PeriodicalIF":2.8,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995417","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}
Nonlinear optical (NLO) crystals such as l-nitroarginine perchlorate (L-NNA·HClO4) and l-nitroarginine tetrafluoroborate (L-NNA·HBF4) were investigated. The crystal and molecular structures of both compounds were determined by single-crystal X-ray diffraction at 100 K. Both crystals crystallize in the monoclinic, non-centrosymmetric space group P21 with Z = 2 and are isostructural, similar to l-arginine salts analogues. Nonlinear optical measurements performed using the modified Kurtz–Perry powder technique demonstrate that both crystals exhibit strong second-harmonic generation (SHG) activity, several times higher than that of known l-arginine salts analogues. The SHG efficiency of L-NNA·HClO4 is approximately 1.5 times higher than that of L-NNA·HBF4. These results demonstrate the potential of l-nitroarginine-based salts as promising semi-organic NLO materials.
{"title":"Study of nonlinear optical crystals of l-nitroarginine perchlorate and l-nitroarginine tetrafluoroborate","authors":"Ruzan Sukiasyan , Ruben Apreyan , Kyrill Suponitsky , Astghik Danghyan , Nelli Gharibyan , Liana Bezhanova , Armen Atanesyan","doi":"10.1016/j.radphyschem.2026.113649","DOIUrl":"10.1016/j.radphyschem.2026.113649","url":null,"abstract":"<div><div>Nonlinear optical (NLO) crystals such as <span>l</span>-nitroarginine perchlorate (L-NNA·HClO<sub>4</sub>) and <span>l</span>-nitroarginine tetrafluoroborate (L-NNA·HBF<sub>4</sub>) were investigated. The crystal and molecular structures of both compounds were determined by single-crystal X-ray diffraction at 100 K. Both crystals crystallize in the monoclinic, non-centrosymmetric space group P2<sub>1</sub> with Z = 2 and are isostructural, similar to <span>l</span>-arginine salts analogues. Nonlinear optical measurements performed using the modified Kurtz–Perry powder technique demonstrate that both crystals exhibit strong second-harmonic generation (SHG) activity, several times higher than that of known <span>l</span>-arginine salts analogues. The SHG efficiency of L-NNA·HClO<sub>4</sub> is approximately 1.5 times higher than that of L-NNA·HBF<sub>4</sub>. These results demonstrate the potential of <span>l</span>-nitroarginine-based salts as promising semi-organic NLO materials.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113649"},"PeriodicalIF":2.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995422","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 : 2026-01-16DOI: 10.1016/j.radphyschem.2026.113639
Ejazul Haque M. Malik, Asma N. Khan, Sabrina A. Shaikh, Ashok K. Pandey, Hemlata K. Bagla
Electron beam irradiation (EBI) was applied to six varietal honey samples obtained from the Western Ghats, India, at doses of 10–40 kGy using a 10 MeV accelerator to assess effects on biochemical composition and functional properties. Pissa honey exhibited the highest baseline phenolic and flavonoid contents and antioxidant activity. The fructose-to-glucose ratio and sugar carbon patterns remained unchanged following irradiation, indicating preservation of the carbohydrate matrix and sensory-relevant parameters. Dose-dependent increases were observed in hydroxymethylfurfural (HMF), total phenolic content (TPC), and total flavonoid content (TFC), with HMF remaining within acceptable regulatory limits and TPC/TFC increasing up to 30 kGy. Correspondingly, radical scavenging activity increased and plateaued beyond 30 kGy. Microbial loads were reduced at 10 kGy, while complete sterilization was achieved at 30 kGy, with no further functional advantage at 40 kGy. Based on these outcomes, 30 kGy was identified as the optimal dose balancing microbial safety, biochemical enrichment, and material stability. The findings support the feasibility of EBI as a non-thermal decontamination method for honey, with relevance to current food safety and irradiation standardization efforts. Identifying an optimal dose is pertinent to policy discussions surrounding Codex Alimentarius and FAO/IAEA frameworks for food irradiation, labeling, and dose harmonization. Such data may inform regulatory consideration of honey as a candidate for irradiated food categories, particularly in medicinal, nutraceutical, and clinical nutrition applications where sterility and biochemical integrity are required. The study also contributes to sustainability-oriented processing approaches that minimize thermal degradation and support extended shelf-life without compromising functional attributes.
{"title":"Functional evaluation of electron-beam irradiated honey sourced from diverse floral ecosystems: A sustainable route for preservation with enhanced quality","authors":"Ejazul Haque M. Malik, Asma N. Khan, Sabrina A. Shaikh, Ashok K. Pandey, Hemlata K. Bagla","doi":"10.1016/j.radphyschem.2026.113639","DOIUrl":"10.1016/j.radphyschem.2026.113639","url":null,"abstract":"<div><div>Electron beam irradiation (EBI) was applied to six varietal honey samples obtained from the Western Ghats, India, at doses of 10–40 kGy using a 10 MeV accelerator to assess effects on biochemical composition and functional properties. Pissa honey exhibited the highest baseline phenolic and flavonoid contents and antioxidant activity. The fructose-to-glucose ratio and sugar carbon patterns remained unchanged following irradiation, indicating preservation of the carbohydrate matrix and sensory-relevant parameters. Dose-dependent increases were observed in hydroxymethylfurfural (HMF), total phenolic content (TPC), and total flavonoid content (TFC), with HMF remaining within acceptable regulatory limits and TPC/TFC increasing up to 30 kGy. Correspondingly, radical scavenging activity increased and plateaued beyond 30 kGy. Microbial loads were reduced at 10 kGy, while complete sterilization was achieved at 30 kGy, with no further functional advantage at 40 kGy. Based on these outcomes, 30 kGy was identified as the optimal dose balancing microbial safety, biochemical enrichment, and material stability. The findings support the feasibility of EBI as a non-thermal decontamination method for honey, with relevance to current food safety and irradiation standardization efforts. Identifying an optimal dose is pertinent to policy discussions surrounding Codex Alimentarius and FAO/IAEA frameworks for food irradiation, labeling, and dose harmonization. Such data may inform regulatory consideration of honey as a candidate for irradiated food categories, particularly in medicinal, nutraceutical, and clinical nutrition applications where sterility and biochemical integrity are required. The study also contributes to sustainability-oriented processing approaches that minimize thermal degradation and support extended shelf-life without compromising functional attributes.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"242 ","pages":"Article 113639"},"PeriodicalIF":2.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978447","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 : 2026-01-16DOI: 10.1016/j.radphyschem.2026.113641
M. Sepiani , M.N. Nasrabadi
The γ-ray strength function (γSF) is one of the most important components of photonuclear and radiative nuclear reaction mechanisms, describing the probability of the gamma-ray emission or absorption. Microscopic models of γSF offer a more fundamental description compared to phenomenological approaches, they cannot be flexibly adjusted to experimental data. To address this problem, a correction method for microscopic γSFs using some adjustable parameters has been implemented in the nuclear reaction codes. This work determines the optimal values of these parameters for microscopic Gogny HFB + QRPA γSF model for neodymium (Nd) isotopes by analyzing existing experimental γSF data for investigating the photonuclear reactions. The results demonstrate that by applying these adjustable parameters, the predictive accuracy of microscopic model for these reactions can be significantly improved. This improvement has important implications for various fields in nuclear physics and technology.
{"title":"Data-driven refinement of microscopic γ-ray strength functions for Nd isotopes","authors":"M. Sepiani , M.N. Nasrabadi","doi":"10.1016/j.radphyschem.2026.113641","DOIUrl":"10.1016/j.radphyschem.2026.113641","url":null,"abstract":"<div><div>The γ-ray strength function (γSF) is one of the most important components of photonuclear and radiative nuclear reaction mechanisms, describing the probability of the gamma-ray emission or absorption. Microscopic models of γSF offer a more fundamental description compared to phenomenological approaches, they cannot be flexibly adjusted to experimental data. To address this problem, a correction method for microscopic γSFs using some adjustable parameters has been implemented in the nuclear reaction codes. This work determines the optimal values of these parameters for microscopic Gogny HFB + QRPA γSF model for neodymium (Nd) isotopes by analyzing existing experimental γSF data for investigating the photonuclear reactions. The results demonstrate that by applying these adjustable parameters, the predictive accuracy of microscopic model for these reactions can be significantly improved. This improvement has important implications for various fields in nuclear physics and technology.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"243 ","pages":"Article 113641"},"PeriodicalIF":2.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995421","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号