Elastic scattering of electrons and positrons from In-115 atoms over the energy range 1 eV-0.5 GeV

We present a theoretical study on the calculations of various cross sections related to the scattering of electrons and positrons from indium atoms. Our calculations cover the energy range 1 eV <= E-i <= 0.5 GeV. We have employed two approaches, applicable for two domains of energy, based on the Dirac partial-wave analysis. In one approach, we have used both the atomic and nuclear potentials to calculate the cross sections for the low and intermediate energies. The other approach, valid for the high-energy scattering, utilizes only the nuclear potential for the phase-shift analysis, and considers the magnetic scattering from the nucleus too. We report the calculations of differential, integral, momentum-transfer and viscosity cross sections along with the spin asymmetries for the elastic scattering of electrons and positrons. Moreover, we have analyzed the critical minima in the elastic differential cross sections, and also computed the absorption and total cross sections. Our results agree reasonably with the available experimental data and other calculations

Scattering of e

The differential, total, momentum transfer and viscosity cross sections for the elastic scattering of electrons and positrons by ytterbium atoms have been calculated. We have also calculated the total inelastic and ionization cross sections. In addition, the Sherman function S(θ) and the inelastic mean free paths have been determined for the scattering of both projectiles. The critical minima in the elastic differential cross sections (DCS) were determined from the analysis of the DCS and S(θ). These investigations have been carried out within the framework of two different theoretical approaches at the impact energies 1 eV–0.5 GeV for both projectiles. In the atomic domain the solution involves a complex projectile-atom optical potential while in the nuclear domain only the nuclear potential has been employed. Both approaches employ the Dirac partial wave analysis. Our results are in reasonable agreement with available experimental data and other theoretical findings. To the best of our knowledge, for positron scattering, there are no experimental data available in the literature

Scattering of e

This work reports on the differential and various angle integrated cross sections for the scattering of electrons and positrons by silicon atoms. Moreover, the Sherman function $$S(\theta )$$ and two other spin asymmetry parameters $$U(\theta )$$ and $$T(\theta )$$ have been calculated. Critical minima in the elastic differential cross sections and maximum spin polarization points were identified for this element. Dirac partial wave method with a complex optical model potential is used to carry out these investigations. Transport characteristics of electrons in silicon vapors and mixtures of inert gases (helium, argon) with silicon vapor were calculated using the Monte Carlo method. For electric field strengths ranging from 1 to 100 Td, drift velocity, average electron energy, diffusion and mobility coefficients, and electron energy distribution function are studied. We have shown that impurities of silicon vapor significantly affect electron transport in noble gases

Scattering of e

The present work reports the calculations of the differential cross sections (DCSs) along-with the critical minima (CM) and the spin polarization or Sherman function for the scattering of electrons and positrons by atomic silver over the incident energies $$1\ \hbox {eV}\ -1\ \hbox {MeV}$$ using the Dirac relativistic wave equation in the framework of the optical potential model (OPM). The energy dependence of the integral elastic cross sections (IECSs), the momentum transfer cross sections (MTCSs), the viscosity cross sections (VCSs), the inelastic cross sections (INCSs), the total ionization cross sections (TICSs) and the total cross sections (TCSs) are also calculated and discussed. The predicted results are compared with the available experimental and theoretical works found in the literature. The DCSs as well as the Sherman functions and other two spin asymmetry parameters $$U(\theta )$$ and $$T(\theta )$$ are calculated at some energies for the first time in this study. Eleven critical minima in the DCSs for $$e^{-}-$$Ag scattering are revealed, the energy and angular positions of which are discussed. We have found 22 maximum polarization points in the vicinity of CM for $$e^{-}-$$Ag collision. Among these 22 points, 21 satisfy the condition of total polarization. So far as we are concerned, the present work is the first one for the calculation of CMs in the DCSs for $$e^{-}-$$Ag scattering