Relativistic electron- and positron-impact ionization of U⁹¹ , U⁹⁰ , Pu⁹³ and Pu⁹² 

Abstract

The relativistic two-potential distorted-wave approximation is applied to the electron- and positron-impact ionizations of hydrogen-like ions U91+ and Pu93+ and helium-like ions U90+ and Pu92+. Relativistic single-differential and total cross sections are calculated. The relativistic cross section of electron-impact ionization is larger than that of positron-impact ionization. Relativistic effects are investigated by taking the nonrelativistic limit. Ionization cross sections are compared with other theoretical calculations and experimental data.

Electron-impact ionization cross section calculations for lithium-like ions

“…[10] In recent years, the two-potential distorted-wave (TPDW) approximation, which uses different asymptotic charges for the distorting potential to study the mutual screening of the faster and slower electrons, has been developed and widely used in the calculation of electron-, positron-, and protonimpact ionizations of hydrogen-, helium-, and beryllium-like ions. [26][27][28][29][30][31][32][33][34] Compared with other theoretical and experimental data, generally more reliable results are obtained in these works.…”