Shahid Chamran University of AhvazJournal of Research on Many-body Systems2322-231X13320231023Photocatalytic activity of graphite-Fe-Ti alloy for the removal of dye pollutant: Synthesis, characterization and optimization studiesPhotocatalytic activity of graphite-Fe-Ti alloy for the removal of dye pollutant: Synthesis, characterization and optimization studies1111851010.22055/jrmbs.2023.18510FASaeidZareiDepartment of Physics, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, Iran0000-0002-7288-1439HosseinRaanaeiDepartment of Physics, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, Iran0000-0002-9226-0269Journal Article20230220This research investigates the photocatalytic activity of mechanically alloyed graphite-iron-titanium powder for the removal of Eriochrome Black-T dye pollution. The structural and optical properties of the alloys are evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy diffraction spectroscopy (EDX), and ultraviolet-visible spectroscopy (UV-vis). X-ray diffraction measurements show that after 35 hours of milling time, the intensity of the element’s peaks decreases, along with the increase of peaks width. The average iron crystallite size is estimated to be approximately 50.8 nanometers. The morphology of the alloyed powders shows that the particles are flattened and plate-like in shape, which is suitable for absorption and photocatalytic activities. Fifteen photocatalytic experiments are designed to remove dye pollution; the optimal dye removal’s parameters for pH, lamp power, and alloy dosage (g/L) are obtained using the combination of artificial neural network, and genetic algorithm (ANN-GA). With optimal conditions, the maximum removal rate is determined to about 86.4%.This research investigates the photocatalytic activity of mechanically alloyed graphite-iron-titanium powder for the removal of Eriochrome Black-T dye pollution. The structural and optical properties of the alloys are evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy diffraction spectroscopy (EDX), and ultraviolet-visible spectroscopy (UV-vis). X-ray diffraction measurements show that after 35 hours of milling time, the intensity of the element’s peaks decreases, along with the increase of peaks width. The average iron crystallite size is estimated to be approximately 50.8 nanometers. The morphology of the alloyed powders shows that the particles are flattened and plate-like in shape, which is suitable for absorption and photocatalytic activities. Fifteen photocatalytic experiments are designed to remove dye pollution; the optimal dye removal’s parameters for pH, lamp power, and alloy dosage (g/L) are obtained using the combination of artificial neural network, and genetic algorithm (ANN-GA). With optimal conditions, the maximum removal rate is determined to about 86.4%.https://jrmbs.scu.ac.ir/article_18510_ad668dacdeb070d503c784c2d7405d6f.pdfShahid Chamran University of AhvazJournal of Research on Many-body Systems2322-231X13320231023Spin-dependent electronic transmission coefficient of a nanostructure in the free-electron approximation by transfer matrix methodSpin-dependent electronic transmission coefficient of a nanostructure in the free-electron approximation by transfer matrix method13191841810.22055/jrmbs.2023.18418FAZahraMoeinDepartment of Physics, Faculty of Science, Shahrekord University, P. O. Box 115, Shahrekord, Iran0000-0000-0000-0000MohammadMardaaniDepartment of Physics, Faculty of Science, Shahrekord University, P. O. Box 115, Shahrekord, Iran0000-0002-6268-5311HassanRabaniDepartment of Physics, Faculty of Science, Shahrekord University, P. O. Box 115, Shahrekord, Iran0000-0002-3327-2040Journal Article20230226In this paper, based on the transfer matrix method and within the free electron approximation, we study spin-dependent electronic transport through an array of magnetic quantum barriers. For this purpose, we first write the Schrodinger equation for the electron in the presence of barrier potentials and the magnetic field originating from system magnetic moments. Then, by its discretization, we reach a system of linear equations. In the following, by using the transfer matrix method for this system of equations, we obtain the spin-dependent transmission coefficients of the electron. With the help of present formalism, one can calculate the spin-dependent transmission coefficient of a transmitted electron through a magnetic multi-layer as a function of electron energy, magnitude and orientation of the magnetic moment, and the potential shape. Finally, as an example, the numerical results are presented for two cases, the one including two similar alternative magnetic barriers and the other including two alternative barriers and well. The presented method is useful for the study of the spin-dependent electronic conductance behavior of magnetic layers and superlattices.In this paper, based on the transfer matrix method and within the free electron approximation, we study spin-dependent electronic transport through an array of magnetic quantum barriers. For this purpose, we first write the Schrodinger equation for the electron in the presence of barrier potentials and the magnetic field originating from system magnetic moments. Then, by its discretization, we reach a system of linear equations. In the following, by using the transfer matrix method for this system of equations, we obtain the spin-dependent transmission coefficients of the electron. With the help of present formalism, one can calculate the spin-dependent transmission coefficient of a transmitted electron through a magnetic multi-layer as a function of electron energy, magnitude and orientation of the magnetic moment, and the potential shape. Finally, as an example, the numerical results are presented for two cases, the one including two similar alternative magnetic barriers and the other including two alternative barriers and well. The presented method is useful for the study of the spin-dependent electronic conductance behavior of magnetic layers and superlattices.https://jrmbs.scu.ac.ir/article_18418_ba44aac786e5cfd536cc9bf560e8496e.pdfShahid Chamran University of AhvazJournal of Research on Many-body Systems2322-231X13320231023The analytical determination of binding energy and magnetic moment of light single-lambda hypernucleiThe analytical determination of binding energy and magnetic moment of light single-lambda hypernuclei21331841910.22055/jrmbs.2023.18419FAAidaArmatFaculty of Physics, Yazd University, P.O. Box 89195-741, Yazd, Iran0000-0003-0087-291XSeyed MohammadMoosavi Nejad1Faculty of Physics, Yazd University, P.O. Box 89195-741, Yazd, Iran0000-0003-0087-291XMansourFarhadiDepartment of Physics, Payame Noor University (PNU), P.O. Box 19395-4697, Tehran, Iran0000-0003-0087-291XJournal Article20230415Hypernuclei are known as the bound states of nucleons and one or more strange baryons (hyperons) so the development of their physics helps to understand the structure of nuclei and the properties of strange baryons with more precision. One important goal in the field of hypernucleus physics is the study of the interaction of hyperon-nucleon and hyperon-hyperon. In this regard, the study of hypernuclei structure can play an essential role in understanding these types of interactions. In this work, we study some important static properties of single-lambda hypernuclei (nuclei containing a -baryon) such as their binding energy and magnetic moments. For our calculation, we use the Dirac relativistic wave equation considering a spin-orbit potential and determine the analytical equation of binding energy and magnetic moments. In the following, we will determine these quantities for some light hypernuclei such as and . Our analytical results will be compared with other theoretical results as well as available experimental data.Hypernuclei are known as the bound states of nucleons and one or more strange baryons (hyperons) so the development of their physics helps to understand the structure of nuclei and the properties of strange baryons with more precision. One important goal in the field of hypernucleus physics is the study of the interaction of hyperon-nucleon and hyperon-hyperon. In this regard, the study of hypernuclei structure can play an essential role in understanding these types of interactions. In this work, we study some important static properties of single-lambda hypernuclei (nuclei containing a -baryon) such as their binding energy and magnetic moments. For our calculation, we use the Dirac relativistic wave equation considering a spin-orbit potential and determine the analytical equation of binding energy and magnetic moments. In the following, we will determine these quantities for some light hypernuclei such as and . Our analytical results will be compared with other theoretical results as well as available experimental data.https://jrmbs.scu.ac.ir/article_18419_3c546134eaad7775b578769431bc1e8d.pdfShahid Chamran University of AhvazJournal of Research on Many-body Systems2322-231X13320231023Stability and bifurcation analysis of nonlinear ion-acoustic waves in superthermal electron-positron-ion plasmasStability and bifurcation analysis of nonlinear ion-acoustic waves in superthermal electron-positron-ion plasmas35511842010.22055/jrmbs.2023.18420FAMostafaMehdipoorDepartment of Physics, Faculty of Science, Gonbad Kavous University, Gonbad Kavous, Iran0000-0001-8524-8248Journal Article20230414In this study, the stability and bifurcation analysis of nonlinear ion-acoustic waves is investigated in a non-Maxwellian plasma consisting of cold ions and Kappa-distributed electrons and positrons. First, a characteristic equation for the evolution of ion-acoustic waves is obtained and then the stability of traveling wave solution on fixed points-energetic positron density plane is discussed numerically. It is found that the motion dynamics of homoclinic orbits and nonlinear periodic orbits undergo a transcritical bifurcation at the critical positron density , where two fixed points coalesce, and then switch their stabilities. The variations of the initial and critical positron concentrations versus a wide range of values of the spectral index of positrons and electron-to-positron temperature ratio are also studied. Furthermore, according to the phase portraits analysis, the coexistence of homoclinic orbits, nonlinear periodic, and super nonlinear periodic orbits is also investigated for different conditions. It is shown that the positron density and the temperature ratio of electron to positron play a crucial role in the propagation of nonlinear waves.In this study, the stability and bifurcation analysis of nonlinear ion-acoustic waves is investigated in a non-Maxwellian plasma consisting of cold ions and Kappa-distributed electrons and positrons. First, a characteristic equation for the evolution of ion-acoustic waves is obtained and then the stability of traveling wave solution on fixed points-energetic positron density plane is discussed numerically. It is found that the motion dynamics of homoclinic orbits and nonlinear periodic orbits undergo a transcritical bifurcation at the critical positron density , where two fixed points coalesce, and then switch their stabilities. The variations of the initial and critical positron concentrations versus a wide range of values of the spectral index of positrons and electron-to-positron temperature ratio are also studied. Furthermore, according to the phase portraits analysis, the coexistence of homoclinic orbits, nonlinear periodic, and super nonlinear periodic orbits is also investigated for different conditions. It is shown that the positron density and the temperature ratio of electron to positron play a crucial role in the propagation of nonlinear waves.https://jrmbs.scu.ac.ir/article_18420_9109c6cb4c8aaf2abd70ce84e7aebffe.pdfShahid Chamran University of AhvazJournal of Research on Many-body Systems2322-231X13320231023Traversable wormholes in Einsteinian cubic gravity with variable red-shift functionsTraversable wormholes in Einsteinian cubic gravity with variable red-shift functions53681850010.22055/jrmbs.2023.18500FAZahraTalbizadehFaculty of physics, Shahid Bahonar University of Kermanaz, Iran0009-0001-3947-0582Mohammad RezaMehdizadehFaculty of physics, Shahid Bahonar University of Kermanaz, Iran0000-0002-5362-0276AmidSadeghi NezhadFaculty of physics, Shahid Bahonar University of Kermanaz, Iran0009-0006-3523-8686Journal Article20230503In this work, we study wormhole solutions described by a radial dependent red-shift function in Einstein-cubic gravity. We derive wormhole solutions by assuming a particular equation of state and check the standard energy conditions. These solutions by imposing suitable values the parameters of the theory satisfy the weak energy condition in the vicinity of the throat. We calculate the null and time-like geodesic equations in the space-time of the wormhole solutions. In addition, by using these solutions and the effective potential formalism, some geodesics are classified. We discuss the geodesics of the test particles and classify them according to the particle’s energy and angular momentum. Finally, using gravitational lensing effects, observational features of the wormhole structure are discussed.In this work, we study wormhole solutions described by a radial dependent red-shift function in Einstein-cubic gravity. We derive wormhole solutions by assuming a particular equation of state and check the standard energy conditions. These solutions by imposing suitable values the parameters of the theory satisfy the weak energy condition in the vicinity of the throat. We calculate the null and time-like geodesic equations in the space-time of the wormhole solutions. In addition, by using these solutions and the effective potential formalism, some geodesics are classified. We discuss the geodesics of the test particles and classify them according to the particle’s energy and angular momentum. Finally, using gravitational lensing effects, observational features of the wormhole structure are discussed.https://jrmbs.scu.ac.ir/article_18500_04a8a8e987547f673207055e273a5304.pdfShahid Chamran University of AhvazJournal of Research on Many-body Systems2322-231X13320231023Nonclassical properties of binomial state in inertial and accelerated motionNonclassical properties of binomial state in inertial and accelerated motion69831841710.22055/jrmbs.2023.18417FASeyedeh RobabehMiryDepartment of Engineering Sciences and Physics, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran0000-0003-1466-3625FatemehAhmadiDepartment of Engineering Sciences and Physics, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran0000-0002-3566-6625Journal Article20220822In this article, we considered the effect of uniform acceleration on the quantum binomial state, which consists of a superposition of single-mode Fock states with binomial coefficients. In particular, we studied the nonclassical features of the quantum binomial state under Unruh effect. We obtained analytically various witnesses of nonclassicality such as squeezing, Mandel parameter, and Vogel’s criterion. We found that squeezing could be increased or decreased by the Unruh effect for different observers. In addition, with the increase of the number of single-mode Fock states in the quantum binomial state, the squeezing increases. Moreover, we found the Mandel parameter and Vogel’s criterion which is a sufficient condition for the nonclassicality of the state and compared the results with the inertial observer.In this article, we considered the effect of uniform acceleration on the quantum binomial state, which consists of a superposition of single-mode Fock states with binomial coefficients. In particular, we studied the nonclassical features of the quantum binomial state under Unruh effect. We obtained analytically various witnesses of nonclassicality such as squeezing, Mandel parameter, and Vogel’s criterion. We found that squeezing could be increased or decreased by the Unruh effect for different observers. In addition, with the increase of the number of single-mode Fock states in the quantum binomial state, the squeezing increases. Moreover, we found the Mandel parameter and Vogel’s criterion which is a sufficient condition for the nonclassicality of the state and compared the results with the inertial observer.https://jrmbs.scu.ac.ir/article_18417_5355c2103d14722a36a6a177bbbbd90d.pdf