Distorted-wave calculation of cross sections for inner-shell ionization by electron and positron impact

Calculation of electron-impact total-ionization cross sections

A computationally efficient analytic form of the Born-approximation electron-impact ionization amplitude is derived for general neutral-atom targets. High-quality Hartree-Fock Slater orbitals are used to model the target wave function. Full orthogonalization of the continuum Coulomb wave to all occupied orbitals of the target atom is enforced. Results are presented for noble gases ~Ne, Ar, Kr, ...

K-shell ionization of atoms by electron and positron impact.

Measurements of absolute cross sections for K-shell ionization of Fe and Mn by electron impact

K-shell ionization cross sections of iron and manganese have been measured for incident electrons with energies varying in the interval from 6.5 to 40 keV, in 1 keV steps. Cross sections were obtained by measuring characteristic x-rays emitted from thin films of the elements studied deposited on carbon self-supporting backing films. Relative cross sections were obtained with uncertainties∼3%. T...

Ionization of K-shell electrons by electron or positron impact

The single ionization of inner-shell electrons by electron or positron impact are the fundamental processes, which still attract considerable interest in collision theory, experimental studies, and various applications. To predict the ionization cross sections, one usually employs either sophisticated numerical approaches or empirical and semiempirical formulas. Significant efforts have been al...

K-shell, L-shell and M-shell Ionization Cross Sections of Uranium Atom by Electron Impacts

The theoretical model, developed by Khare model, has been modified to calculate the total cross sections for K-shell, L-shell and M-shell ionization of uranium (Z=92) atom due to electron impact at incident electron energy from ionization threshold to 1 GeV. The various calculated cross sections are in remarkable agreement with available experimental data and other theoretical cross sections. P...