[en] The formation of Tl²⁺ excited states in electron impact ionization process is investigated for the first time by the spectroscopic method in intersecting modulated beams. The obtained results are compared with theoretical calculations of s- and d-ionization cross section via the Lotz formula and also with the total electron impact ionization cross section of Tl⁺ ions

[en] Radiation transitions between 4d⁹(²D_5/2,3/2)5s²nl and 4d¹⁰5p(²P_1/2,3/2⁰)nl self-ionized states of Cd atom being dielectron satellites of λ325.0 nm (4d⁹5s²²D_3/2 →4d¹⁰5p²P_1/2⁰) and λ353.6 nm (4d⁹5s²²D_3/2 → 4d¹⁰5p²P_3/2⁰) laser lines of Cd⁺ ion were detected for the first time at electron-ion collisions. One studied energy dependences of the effective cross sections of electron excitation of the satellite lines within 7-10 eV energy range. The effective cross sections of excitation of dielectron satellites constitutes ∼ 10^-17 cm² that is comparable with the efficiency of excitation of the laser lines

[en] Using ultrasoft X-ray (USX) spectroscopy in crossed modulated beams systematic investigation of electron impact s-ionization for K⁺, Rb⁺ and Cs⁺ ions from the threshold to 300 eV is carried out. Energy dependences are studied and effective cross sections of USX-doublet component excitation are determined. Near their excitation threshold a resonance structure which origin is explained by ion capture of bombarding electrons with simultaneous excitation of these ion outer shell s- and p-electrons. Summing USX-doublet component excitation cross sections s-ionization effective cross sections compared to those calculated by Lotz formula as well as to total cross sections of electron impact ionization for K⁺, Rb⁺ and Cs⁺ ions are determined

[en] Dielectronic recombination (DR) of Te⁺ ion was studied for the first time in crossed beams. Investigation was conducted by detection of vacuum ultraviolet radiation, occurring in radiation transitions from autoionization states (FIS) of 6s6p²-configuration to the ground 6s²6p ²P⁰_1/2,3/2-stable of Tl atom and from AIS of 6s6p(³P⁰, ¹P⁰)np-configuration to excited levels of Tl atom. Energy dependences of DR were investigated and its effective cross sections were determined. 12 refs., 3 figs

[en] The results of spectroscopic investigation of resonances in excitation of near threshold region of separate components of resonance doublet 4p ²P_1/2,3/2⁰ of Zn⁺ ion by electron impact are given in the present work. The physical basis of their production nature is suggested

[en] By means of spectroscopic method in crossing beams one for the first time investigated into excitation of separate components of a resonant 4p²P_1/2,3/2⁰-doublet of Zn⁺ ion by electron impact. A distinct structure detected on the energy dependences of excitation efficient cross section (beyond ion ionization potential, as well) is associated mainly with decay into resonance levels of self-ionization states of zinc atom and ion resulted from excitation of electron from subvalent 3d¹⁰-shell. The obtained results are compared with data acquired in the course of other experiments and with theoretical calculations

[en] Dielectronic recombination of Zn⁺ and Cd⁺ ions involving electron excitation of the ion ns core with simultaneous resonance capture of an incident electron into the doubly-excited intermediate autoionizing np^{2 1}S0-state followed by its radiative stabilization np² → nsnp + hν was observed and investigated using an ultrahigh-vacuum apparatus with crossed electron and ion beams. The effective cross sections of dielectronic recombination at the maximum were 0.9×10^-17 cm² for Zn⁺ and 1.6×10^-17 cm² for Cd⁺, which were comparable with those for electron excitation of the resonance lines of the studied ions. The high probability of radiative decay of the autoionizing np^{2 1}S0-state was due to relativistic and correlation effects. (authors)

[en] Excitation of resonance intercombination Tl2 line lambda=190.8 nm is studied for the first time in intercrossing electron and ion beams. Resonance structure conditioned by the contribution of autoionization states of thallium atom into the population of the 6³P₁ level of thallium ion. A complicated energy behaviour of excitation cross section of thallium ion intercombination transition reflects mechanisms conditioned by the influence of relativistic and resonance effects in external shells under the conditions of concurrence of several processes: direct transition of electron from the ground state into excited one with spin change , population of levels through autoionized states of atom, and at the expence of cascade transitions as well

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