| Affiliation: | (1) Jerusalem College of Engineering, Ramat Beth Hakerem, 91035 Jerusalem, Israel;(2) Racah Institute of Physics, The Hebrew University, 91904 Jerusalem, Israel;(3) Nuclear Research Center-Negev, P.O. Box 9001, 84190 Beer Sheva, Israel |
| Abstract: | Results of cross-section and rate coefficient calculations for electron impact direct and indirect ionizationof ions belonging to the GeI isoelectronic sequence (ground 3d104s24p2) are presented. The cross-sectionsare given at near threshold energies for the five ions Kr4+, Mo10+, Xe22+, Pr27+ and Dy34+.The rate coefficients are computed for all the ions from Kr4+ to U60+ in the GeI sequence at seven electron temperatures (kTe = 0.1EI, 0.3EI, 0.5EI, 0.7EI,EI, 2EI and 10EI, where EI is the first ionization energy). The calculations include the contribution of directionization (DI) calculated with the Lotz formula approximation and the contributions of excitation-autoionization (EA) calculatedin the framework of the distorted wave (DW) approximation for the 4s-nl, 3d-nl and 3p-nl resonant inner-shell excitations. The ionization enhancement dueto the EA channels is shown as a function of Z along the GeI isoelectronic sequence. |
