ADIABATIC INNER-SHELL IONIZATION BY LIGHT-IONS

Authors
Citation
Z. Smit, ADIABATIC INNER-SHELL IONIZATION BY LIGHT-IONS, Physical review. A, 53(6), 1996, pp. 4145-4150
Citations number
31
Categorie Soggetti
Physics
Journal title
ISSN journal
10502947
Volume
53
Issue
6
Year of publication
1996
Pages
4145 - 4150
Database
ISI
SICI code
1050-2947(1996)53:6<4145:AIIBL>2.0.ZU;2-1
Abstract
For very slow collisions, the ionization cross section depends on the projectile kinematics in the combined field of the nucleus and atomic electrons, on the time evolution of the electron wave function, and on the recoil of the nucleus. First-order semiclassical cross sections i n the united-atom limit were calculated for the Thomas-Fermi and Hartr ee-Fock screening potentials. The time evolution of the wave function was considered by the model of a perturbed harmonic oscillator and by a simplified atomic model involving only a few lowest states. Theoreti cal K-shell ionization cross sections were compared with the mean expe rimental data calculated for groups of atoms with neighboring atomic n umbers. It was pointed out that the averaging process, also employing theoretical data, depends essentially on the projectile kinematics in the screened atomic field. Taking this into account, good agreement be tween mean experimental and theoretical cross sections was obtained.