The European Physical Journal Plus最新文献

{"title":"On Compton ionization of a hydrogen atom by twisted photons","authors":"Vadim Egorov,&nbsp;Igor Volobuev","doi":"10.1140/epjp/s13360-025-06827-7","DOIUrl":"10.1140/epjp/s13360-025-06827-7","url":null,"abstract":"<div><p>The differential probability of the process of Compton ionization of a hydrogen atom by a cylindrical electromagnetic wave is calculated taking into account the finite size of the target, which resulted in the appearance of a dependence of this value on the angular momentum of the cylindrical wave. It is shown that for any cylindrical wave there exists a plane wave with a propagation direction different from that of the cylindrical wave giving the same angular distribution of the reaction products.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100525","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":"Synthesis and thermoluminescence dosimetry properties of ZnGa2O4: Eu nanocrystals","authors":"Mansoureh Tatari,&nbsp;Samaneh Badreh,&nbsp;Maryam Erfani Haghiri","doi":"10.1140/epjp/s13360-025-06845-5","DOIUrl":"10.1140/epjp/s13360-025-06845-5","url":null,"abstract":"<div><p>Thermoluminescence and dosimetry characteristics of the Europium-doped zinc gallate (ZnGa₂O₄: Eu) nanocrystals synthesized via the sol–gel method have been experimentally studied. At the glow curve of ZnGa₂O₄: Eu, the prominent TL peak is observed at 210 °C, which is helpful for dosimetry applications. Investigating the effect of the amount of Eu on the dosimetry properties shows that the TL glow peaks’ maximum intensity is obtained with a 2 mol% concentration of Eu, whose sensitivity is 2.4 times higher than undoped ZnGa₂O₄ samples. Further, with gamma irradiation in a wide range of doses from 300 to 12 kGy using a ⁶⁰Co gamma source, the linear dose response is observed up to 5 kGy in the Eu-doped zinc gallate samples. Other features, such as fading and reproducibility of the TL dose response, are also investigated. Considering the good results of this research, ZnGa₂O₄: Eu nano phosphor is suggested for high-dose gamma dosimetry applications.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110617","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":"First-order molecular hyperpolarizability of xanthoangelol derivatives","authors":"Felipe A. Santos,&nbsp;Hugo J. N. P. D. Mello,&nbsp;Martin S. Barbosa,&nbsp;Luis M. G. Abegão","doi":"10.1140/epjp/s13360-025-06830-y","DOIUrl":"10.1140/epjp/s13360-025-06830-y","url":null,"abstract":"<div><p>This study explores the dynamic first-order molecular hyperpolarizability (<span>({beta }_{2omega })</span>) of eight xanthoangelol (XAG) derivatives divided into two series. The first includes four XAG-based compounds previously synthesized and reported in the literature (XAG, XAG-B, XAG-I, and XAG-J), while the second comprises four novel, theoretically designed derivatives (XAG-C1, -C2, -P1, and -P2). These new structures enhanced π-conjugation along the prenyl (P) and chalcone (C) chains, improving the <span>({beta }_{2omega })</span> response. Quantum-chemical calculations (QCC) were performed at three key operational wavelengths, 1064 nm, 1310 nm, and 1550 nm, relevant to laser applications and optical communications. The <span>({beta }_{2omega })</span> values were computed under solvent conditions using five levels of theory (HF, B3LYP, CAM-B3LYP, M06-2X, and ωB97Xd) and 21 Pople-type basis sets, ranging from less robust (6-311G) to more advanced (6–311 +  + G(2d,2p)). Computational cost was also evaluated to guide future modeling efforts. Compared to potassium dihydrogen phosphate (KDP), a standard reference in nonlinear optical (NLO) materials, all XAG derivatives exhibited significantly enhanced <span>({beta }_{2omega })</span> responses. XAG-C2 showed the highest value at 1064 nm, reaching approximately 154 × 10⁻³⁰ cm⁴ statvolt⁻¹—five times greater than XAG. This study highlights the potential of XAG derivatives as promising candidates for future organic photonic applications based on optical frequency conversion.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100530","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":"Mittag–Leffler and asymptotic adaptive projective synchronization of fractional inertial neural networks in quaternion field","authors":"Md Samshad Hussain Ansari,&nbsp;Muslim Malik,&nbsp;Juan J. Nieto","doi":"10.1140/epjp/s13360-025-06840-w","DOIUrl":"10.1140/epjp/s13360-025-06840-w","url":null,"abstract":"<div><p>This paper investigates the problems of Mittag–Leffler projective synchronization (MLPS) and asymptotic adaptive projective synchronization (AAPS) in fractional quaternion-valued inertial neural networks (FQVINNs) subject to parametric uncertainties. To facilitate the analysis, the original FQVINN model is reformulated into an equivalent fractional system through an appropriate variable transformation. Two synchronization strategies are proposed: a quaternion-valued feedback controller is designed to realize MLPS, while a fractional adaptive controller is developed to achieve AAPS. By employing tools from fractional differential inequality theory and Lyapunov stability analysis, sufficient conditions for the synchronization of FQVINNs are rigorously established. The effectiveness of the proposed control schemes is demonstrated through a numerical example, which confirms the theoretical predictions and highlights the practical applicability of the methods.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090515","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":"Synthesis, characterization, and evaluation of antibacterial and antioxidant properties of (Ag–NiO) nanocomposite using alternating magnetic field technique","authors":"Waleed K. Abdulkadhim,&nbsp;Alaa Alasadi,&nbsp;Ali Ghanim Gatea AL Rubaye,&nbsp;Salim Albukhaty,&nbsp;Uday M. Nayef,&nbsp;Majid S. Jabir","doi":"10.1140/epjp/s13360-025-06838-4","DOIUrl":"10.1140/epjp/s13360-025-06838-4","url":null,"abstract":"<div><p>In this study, a silver–nickel oxide (Ag–NiO) nanocomposite was synthesized using a chemical reduction method involving nickel chloride, sodium hydroxide, ethylene glycol, silver nitrate, PVP, and hydrazine. The formation of NiO nanoparticles was indicated by a color change upon heating, followed by silver incorporation to yield the final Ag–NiO nanocomposite. Structural, morphological, and magnetic characterizations were performed using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometry. XRD analysis confirmed the crystalline structure with Ag peaks consistent with cubic phase (JCPDS No. 87-0719) and revealed crystallite sizes between 18 and 26 nm. Antibacterial activity was evaluated against <i>Staphylococcus aureus (S. aureus)</i> and <i>Escherichia coli (E. coli)</i> using the agar well diffusion method and cellular material release assay, demonstrating effective bacterial inhibition and membrane disruption. Antioxidant capacity was assessed via the DPPH assay, with the nanocomposite showing significant free radical scavenging activity. These findings suggest that the Ag–NiO nanocomposite possesses promising antimicrobial and antioxidant properties, with potential applications in biomedical and environmental fields.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090506","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":"Design of an efficient nanoscale reversible arithmetic and logic unit using quantum dots for energy-efficient digital signal processing devices","authors":"Haiyan Cao,&nbsp;Wenbin Song","doi":"10.1140/epjp/s13360-025-06772-5","DOIUrl":"10.1140/epjp/s13360-025-06772-5","url":null,"abstract":"<div><p>Digital signal processing (DSP) plays a vital role in real-time analysis and transformation of signals, supporting biomedical, wireless communication, image processing, and control systems. In nanotechnology, DSP is an essential part of interfacing sensors, doing image processing, collecting data from nanodevices, and performing high-speed calculations in compact environments. In response to the demand for increased processing speeds while minimizing physical area and power consumption, traditional computing architectures are now significantly constrained. The arithmetic and logic unit (ALU) is the most important part of signal processing and computational systems, carrying out arithmetic and logic operations as well as additions and subtractions. On the nanoscale level, DSP ALUs are required to be very efficient, have low power consumption, and use minimum physical area. According to Landauer's concept, conventional ALUs designed utilizing complementary metal–oxide–semiconductor (CMOS) technology are made to be permanent, wasting a significant amount of energy and also losing information while operating. To handle these problems, the latest developments suggest an ALU architecture that can be reversed and constructed using quantum dot cellular automata (QCA) nanotechnology. This design applies a coplanar reversible full adder that is built with the Haghparast and Navi Gate (HNG) and modified Fredkin (MF) gates to make the main part of the ALU. The suggested ALU in nanotechnology delivers a desirable improvement in this performance. Simulation results show a decrease in cell count, an increase in area efficiency, and a decrease in latency of 16.37%, 44.59%, and 41.17%, respectively, which places it among the smallest and fastest reported QCA-based ALU designs to date. These developments can greatly optimize DSP architectures, resulting in more energy-efficient, faster nanoelectronic systems needed to support future high-performance computing systems. The suggested design is not just simpler hardware, but it also enhances the promise of QCA-based circuits to scalable nanoelectronic integration in emerging technologies.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090505","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":"Gibbs–Duhem equation for Kerr–Newman black holes","authors":"Osmar E. López-Pérez,&nbsp;Josué Trujillo,&nbsp;Miguel Socolovsky","doi":"10.1140/epjp/s13360-025-06844-6","DOIUrl":"10.1140/epjp/s13360-025-06844-6","url":null,"abstract":"<div><p>We show that the intensive variables associated with the outer and inner horizons of the Kerr–Newman black hole: absolute temperatures, angular velocities and electromagnetic potentials, obey a Gibbs–Duhem type relation, which is closely related, but however distinct, to the Smarr equation. Thus, analogously as in ordinary thermodynamics, <span>(T_{pm })</span>, <span>(Omega _{pm })</span> and <span>(Phi _{pm })</span> are not independent quantities. The relation also holds in the Kerr and Reissner–Nordström cases, while in the Schwarzschild case it is trivially fulfilled due to the zeroth law of black hole mechanics.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06844-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grafting of functional MWCNTs with biogenic synthesized CuO nanoparticles: photocatalytic and in silico molecular docking supported antimicrobial investigations","authors":"Ankita Taneja,&nbsp;Sushil Kumar,&nbsp;Rajwinder Singh,&nbsp;Sanjeev Kumar","doi":"10.1140/epjp/s13360-025-06796-x","DOIUrl":"10.1140/epjp/s13360-025-06796-x","url":null,"abstract":"<div><p>The contamination of drinking water with various organic pollutants and pathogenic strains is the main issue of environmental concerns. The present work reports green synthesis of pure and multiwall carbon nanotubes (MWCNTs) grafted CuO nanoparticles using <i>Azadirachta indica</i> leaf extract for photocatalytic degradation of methylene blue (MB) dye and antimicrobial applications against gram-positive/gram-negative pathogenic strains. The synthesized nanostructures were characterized using powder X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), energy-dispersive X-ray (EDX) mapping, UV–vis diffused reflectance spectroscopy (DRS), Raman and Fourier transfer infrared (FTIR) measurements. The detail experimental investigations on photocatalytic measurements revealed that MWCNTs/CuO (synthesized using 20 mL <i>Azadirachta indica</i> leaf extract and 15 mg MWCNTs) showed complete degradation for MB dye with <i>k</i> = 0.0572 ± 0.0078 min⁻¹ in presence one drop of H₂O₂ scavenger under 60-min UV light exposure relative to other synthesized nanomaterials. The obtained biocidal results clearly revealed that maximum zone of inhibition (ZOI) has been noticed for (i) Escherichia coli bacteria (diameter of ZOI = 24 mm), (ii) Pseudomonas aeruginosa (diameter of ZOI = 24 mm), and (iii) Bacillus subtilis (diameter of ZOI = 18 mm) strains in presence of nanocomposite synthesized using 20 mL leaf extract solution in 10 mg MWCNTs at 75 mg/ml and 50 mg/ml concentration. Antibacterial results are fully supported by in silico molecular docking study on <i>Fabl</i> (PDB ID: 1mfp) protein of Escherichia coli, <i>LasR</i> (PDB ID: 2UV0) protein of Pseudomonas aeruginosa and <i>FTsZ</i> (PDB ID: 4dxd) protein of Bacillus subtilis.</p><h3>Graphic Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090449","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":"Cancer risk assessment of natural radioactivity in some areas at Al-Anbar Governorate, Iraq","authors":"Leith Hani Rasheed,&nbsp;Muhanad Alrakabi,&nbsp;Ali Abid Abojassim","doi":"10.1140/epjp/s13360-025-06841-9","DOIUrl":"10.1140/epjp/s13360-025-06841-9","url":null,"abstract":"<div><p>Humans have been exposed to natural radioactivity from soil since the beginning of their existence on Earth. Making it a serious risk to human health and the environment. This study aims to evaluate the specific activity of natural radionuclides (uranium-238, thorium-232, and potassium-40) and radiological hazard indexes in soil samples from nine regions in Al-Anbar Governorate, Iraq. The Geographic Information System (GIS) technique was used to map the results. The average specific activity of ²³⁸U ranged from 18.28 ± 7.98 Bq/kg in the Al-Karma region to 54.96 ± 27.89 Bq/kg in the Rawa region. The results for 232Th ranged from 9.83 ± 4.04 Bq/kg in the Anah region to 23.61 ± 8.26 Bq/kg in the Ramadi region, while the results for 40K ranged from 148.68 ± 71.42 Bq/kg in the Rawa region to 367.74 ± 45.97 Bq/kg in the Ramadi region. Additionally, the average values of Excess Lifetime Cancer Risk (ELCR) due to 238U, 232Th, and 40K in all regions were between 0.11 × 10⁻³ and 0.18 × 10⁻³, which is below the global average limit. The results of the specific activity of 238U in five regions were lower than the world level, while the results for 232Th and 40K were lower than the international level. Overall, the cancer risk results for the studied areas in Al-Anbar Governorate, Iraq, were within the safe limit.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078948","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":"Parameterized genuine multipartite entanglement measure based on (alpha)-concurrence","authors":"Rui-Zhou Liang,&nbsp;Zhi-Xiang Jin,&nbsp;Wei Chen,&nbsp;Yan-Ling Wang","doi":"10.1140/epjp/s13360-025-06839-3","DOIUrl":"10.1140/epjp/s13360-025-06839-3","url":null,"abstract":"<div><p>Entanglement is a crucial resource for various applications in quantum information processing. We propose a parameterized genuine multipartite entanglement measure based on <span>(alpha)</span>-concurrence termed <span>(alpha)</span>-<span>(text {GME})</span>, which applies to n-partite quantum systems. Our measure identifies GHZ states as being more entangled than W states, an essential distinction in the study of quantum entanglement. By employing positive partial transposition and realignment criteria, we derive analytical lower bounds for the <span>(alpha)</span>-<span>(text {GME})</span>. Furthermore, the measure is shown to be inequivalent under entanglement ordering comparison, indicating that it captures different aspects of entanglement compared to existing measures. Through detailed examples, we demonstrate that our measure provides a more refined detection of multipartite entanglement, particularly in distinguishing between different entangled states. This makes our proposed measure a valuable tool for characterizing and quantifying entanglement in quantum systems.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078949","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}