We report here on extensive calculations of radiative and autoionization transition rates, x-ray wavelengths and fluorescence yields of hollow argon atoms with configurations with m = 0 - 2 and n = 1 - 6. The calculations have been performed in the intermediate coupling scheme using the multiconfiguration Hartree - Fock atomic model.
We present a method of deriving energy and angle-dependent electron-ion elastic scattering cross sections from doubly differential cross sections for electron emission in ion-atom collisions. By analyzing the laboratory frame binary encounter electron production cross sections in energetic ion-atom collisions, we derive projectile frame differential cross sections for electrons elastically scattered from highly charged projectile ions in the range between 60°and 180°. The elastic scattering cross sections are observed to deviate strongly from the Rutherford cross sections for electron scattering from bare nuclei. They exhibit strong Ramsauer-Townsend electron diffraction in the angular distribution of elastically scattered electrons, providing evidence for the strong role of screening played in the collision. Experimental data are compared with partial-wave calculations using the Hartree-Fock model.
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