[en] Continues a landmark series, this one dealing with areas of atomic physics such as photoionization, photoelectron spectroscopy, and the Auger effect. For the four chapters, manuscripts were completed December 1978 (for the first two), October 1981 and August 1979. Contents: Theory of atomic photoionization, Atomic photoionization. Photoelectron spectroscopy. Theory of the Auger effect

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[en] The shape and intensity of resonances seen in secondary electron spectra as well as correlation effects in the decay process of Auger states are treated. 12 refs

[en] This chapter reviews the results obtained in the studies of inner-shell ionization and decay by means of photoelectron (PES) and Auger electron spectrometry (AES). Considers AES only in connection with photon or electron impact ionization. Demonstrates the sort of information one can obtain for atoms by means of selected examples of inner-shell photo- and Auger electron spectra. Emphasizes the effects caused by the electron correlation. Discusses the shift and distortion of the main photoelectron line; satellites in PES; correlation satellites due to final ionic state configuration interaction (CI); and post-collision interaction in inner-shell ionization

[en] In this chapter, Auger-electron spectrometry (AES) is discussed in connection with free atoms and with main emphasis on the study of the structure and the dynamics of the atoms. The perturbation-theoretical treatment of the Auger effect and an important extension beyond it is presented. The experimental arrangement for AES of free atoms is briefly discussed. Diagram Auger transitions and satellite Auger transitions are also discussed. Examples of satellite Auger spectra of multiply ionized target and projectile atoms are presented. The nonisotropic emission of Auger electrons and the effects of the postcollision interaction in inner-shell inoization on the Auger spectrum are also discussed

[en] Topics covered include: correlation effects in diagram Auger spectra; double Auger and radiative Auger transition; multiple ionization Auger satellite transitions; hypersatellite transitions; and autoionizing transitions

[en] In this paper, the alignment of inner-shell ionized atoms is discussed in the light of present theoretical understanding and of recent experimental results. In particular, the following two-step processes are considered: [/sup p/γ] + A(Jo) → A⁺ /sub (inner shell)/ (JM) + [/sup p + e^-/e^-/sub ph/(l/sub j/)]. II. Decay: A⁺/sub (inner shell)/ (JM) yields A⁺⁺ (J /sub f/) + e^- /sub Auger/ (l¹/sub j¹/) or A⁺ (J¹ /sub f/) + γ¹. As projectiles, P, either electrons or light ions will be considered. 63 references, 13 figures

[en] The alignment A₂₀ of Ar⁺ (2p^-1_3/2), Mg⁺ (2p^-1_3/2) and of Zn⁺ (3d^-1_3/2) ions after electron impact ionization have been measured via the angular distribution of Auger electrons and the linear polarization of fluorescence radiation for the range of impact energies E₀ from several times the threshold energy down to near or even to the threshold. The experimental results are compared to PWBA and DWBA values which are available for Ar and Mg 2p_3/2 ionization. From the alignment values obtained near or at threshold it is concluded that two-electron partial waves with L = 0 and L > 0 (for Zn 3d_3/2 ionization this can be specified up to L = 0,1,2) contribute to the Wannier threshold cross section. (orig.)

[en] Some recent progress in Auger and autoionizing electron spectrometry of free metal atoms and of multiply ionized atoms is reviewed. The differences which arise between the spectra of atoms in the gaseous and the solid state are due to solid state effects. This will be shown for Cd as an example. The super Coster-Kronig transitions 3p-3d² (hole notation) and Coster-Kronig transitions 3p-3d 4s have been measured and compared with free-atom calculations for free Zn atoms. The experimental width GAMMA(3p)=(2.1+-0.2)eV found for the free atom agrees with the value obtained for solid Zn but is considerably smaller than the theoretical value for the free atom. Autoionizing spectra of Na following an L-shell excitation or ionization by different particles are compared and discussed. The nonisotropic angular distribution of electrons from the transition 2p⁵ 3s²²Psub(3/2)→2p⁶+e^- is compared with theoretical calculations. Two examples for Auger spectrometry of multiply ionized atoms are given: (1) excitation of neon target atoms by light and heavy ions, and (2) excitation of projectile ions Be⁺ and B⁺ in single gas collisions with CH₄. A strong alignment of the excited atoms has also been found here

[en] The phenomenon of 'alignment' is defined and investigated in ion-atom collision processes. The collision leads to an alignment of ionized and excited atoms. The parameters describing alignment are defined and interpreted. Theoretical calculations on alignment and anisotropy taking place in the course of collision processes (Auger effect, autoionization, inner-shell ionization, inner-shell excitation) are performed and the results are compared with experimental data. (D.Gy.)