Theoretical studies on the elastic scattering of e^± off the ions of xenon isonuclear series

Abstract

This work presents the calculations of differential, integrated elastic and momentum transfer cross sections for the elastic scattering of electrons from the ions of xenon isonuclear series over the incident energy range 1 eV–1000 eV. Coulomb glory, the amplification of elastic backscattering of electrons from positive ions owing to the electrostatic screening of nuclear potential by atomic electrons, is investigated throughout the ionic series of xenon, argon and neon. Cross sections for the angular distribution of elastically scattered positron from selected xenon ions are also calculated. Energy dependency of differential cross sections and Sherman functions are predicted for both the projectiles and a comparison is presented to exhibit the dissimilarity arising out of the difference of the interactions of the projectiles with ions. The theoretical methodology of this work employs the Dirac relativistic partial wave analysis using a complex optical potential, comprising static, exchange, polarization and imaginary components, and a pure Coulomb potential. The results obtained show reasonable agreements with the available experimental data and other theoretical calculations.

Scattering of electrons and positrons from aluminum isonuclear series

“…The availability of experimental data on e ± -Al q+ is insufficient in the literature. However, the agreement of our prediction with the available theoretical calculations and the success of our model for previous works [4,3,5,33,34,7,8,53] play an important role in the validation of the calculations presented in this work. This work can be easily implemented to generate reasonably accurate cross-sections required for applications in science and industrial technologies.…”

“…In particular, accurate estimation of the scattering observables is a requisite in such applied and research areas as atmospheric physics, semiconductor lithography, x-ray lasers, surface analytical techniques, electron microscopy, electron-probe microanalysis, nuclear medicine, radiation biology, radiotherapy, design of radiation detectors, radiation protection, fusion energy research, etc [2,3]. Data from electron-ion collisions are needed for the spectroscopic interpretation and theoretical modeling of the formation and time evolution of artificial, terrestrial, space, and astrophysical plasmas [4,5].…”

“…On the other hand, a comprehensive set of observable quantities for positron scattering is a requisite in astrophysical research, radiation-based technologies, and energy deposition models [1]. This antimatter-matter interaction provides the physics of positron transport in the interstellar medium that might be useful to study the spatial distribution of positrons in galactic space and the constraints related to the origin of positrons [5].…”

“…Data for e ± − ion collision, particularly throughout the isonuclear series, are scarce in the literature. In our earlier works [3][4][5]33], we investigated different scattering observables of electron and positron scattering from the ionic series of inert gases including Ne, Ar, Xe, and Rn. Calculations revealed a number of identical behavior due to the similarity in their electronic structure and produced a reasonable agreement with available data.…”

Theoretical investigations of e ± –CO scattering

“…The partial wave series converge very slowly for the small angle elastic scattering by molecules. There is scope for 25 000 partial waves [7,59]. Angular momentum is increased up to a certain maximum for which the absolute value of the phaseshift is less than 10 −9 .…”