In the present study, the microwave resonant plasma source has been designed to provide the ionosphere like condition inside the Iranian Space Plasma Simulation Chamber (ISPSC). This chamber contains plasma with electron density of 1×105 −1×1010 cm−3 and temperature of 1-5 eV. In order to reach these plasma parameters inside the ISPSC, the plasma source […]
In this study, we determine the effective permittivity of a medium in which spherical inclusions are embedded in a host medium whose permittivity is given by ε_h. It is interesting to note that the inclusions are made up of graphite and their basal planes are oriented in two configurations, 1) parallel and, 2) perpendicular to […]
In this paper, a set of two-fluids equations based on the quantum magnetic hydrodynamic model (QMHD) for electron-positron plasma were considered and the role of spin in different spin-spin, and spin-field interactions were briefly discussed. Furthermore, effects of density and heterogeneity in the equations were considered. For each of the two electron and positron fluids, […]
The pondermotive force causes interesting nonlinear processes in the interaction of the intense laser beam with plasma. The pondermotive effect modifies the profile density, and in turn, affects the propagation of the laser beam through the plasma medium. Here, it is considered the inhomogeneous collisional plasma, and assumed that a high-intensity laser beam passes through […]
In the fractional nonrelativistic potential model, the decomposition of heavy quarkonium in a hot magnetized medium is investigated. The analytical solution of the fractional radial Schrödinger equation for the hot-magnetized interaction potential is displayed by using the conformable fractional Nikiforov-Uvarov method. Analytical expressions for the energy eigenvalues and the radial wave function are obtained for […]
Impacts of the liquid environment on the characteristics of pulsed laser ablation (PLA) synthesized tungsten (W) nanostructures have been investigated. High purity W target was irradiated by the fundamental wavelength of a Q-switched Nd:YAG laser of 7 ns pulse width and 1 J/cm2 laser fluence in different liquid environments including distilled water, ethanol, acetone, and […]
The present paper investigates the spin- XX model with three-spin interaction (TSI) from a view point of bipartite entanglement. The three-spin system is initially chosen by well-known W entangled state. By analyzing the time-dependency of the concurrence between the nearest and the next-nearest neighbor pair of spins, we show that where the quantum phase transition […]
Bimetallic Au-Ag nanoparticles with homogeneous dispersion in amine-modified SBA-15 mesoporous silica channels were successfully synthesized by the post-modification method. The obtained nanocomposites with different component ratios were studied by structural, Physico-chemical, and optical analysis. The structural and Physico-chemical properties were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and […]
In this study, the thermoelectric properties of the (6, 3) two sided-closed single-walled boron nitride nanotubes are investigated. To examine the effect of the impurity on the thermoelectric properties, carbon atom is replaced instead of boron and nitrogen atoms at the center, left and right the nanotube. The energy range is selected as -5.5 to […]
This work presents a study on the thermo-optical properties of colloidal gold nanoparticles (AuNPs) and platinum nanoparticles (PtNPs) under a low power laser irradiation at 532 nm. Samples of gold and platinum are synthesized by nanosecond pulsed laser ablation of pure gold and platinum plates in the distilled water. The formation of the AuNPs and […]
This work deals with the theoretical analysis of ultrasonic relaxation in the glass system xNb2O5 – (100− x) TeO2 glasses, and 4 ≤ x ≤22.5 mole %. The parameters of the theoretical analysis deal with the transmission of ultrasonic waves through dual-well potential. The parameters are alternate potential energy, centers of energy loss, and elongation […]
