[en] The organization and structure of elaborated database of differential Auger spectra is presented. The first page of this set, available in complete form from the author, is demonstrated. The advantages page of taking into account the data set, in analytical work using Auger spectroscopy, are indicated. (author)

No abstract available

[en] The techniques of Auger electron spectroscopy and ellipsometry are applied to the study of the surface films formed on copper in aqueous solutions containing an inhibitor, benzimidazole. The results show the surface film to be non-stoichiometric, 64 nm thick, with an approximate composition and optical constant of Cu₆N₅.₅O₂ and 1.50(1 - 0.02i), respectively

[en] Measured chemical shifts of photoelectron and auger electron energies of solid silicon compounds are used for determination of relaxation energy shifts. The trends of these shifts and their dependence on parameters characterizing the chemical bond as electronegativity are discussed. The shirley approach for determination of relaxation energy shifts proves to be a sensitive method for describing electron changes when atoms combine to forms molecules or solids. It is able to distinguish between the atomic term and the surroundings term of the chemical shifts by means of XPS (author)

[en] Part VII of this Data bank is the last part in this series of articles. It is concerned with the HE(I) and HE(II) photoelectron spectra of miscellaneous compounds: H₂S and inorganic fluorides, hydrocarbons, NH₃ and organic nitrogen compounds, cyano-substituted hydrocarbons, organic oxo-compounds, organic sulphur compounds, organic compounds containing both N and O atoms, organic halogen compounds, and diatomic halogens. (orig./TW)

[en] A simulation study of Auger electron spectroscopy was performed to reveal how far the dependency between the different parameters governing the experimental behavior affects the peaks. The experimental procedure followed by the AC modulation technique were reproduced by means of a computer program. It generates the assumed output Auger electron peaks, exposes them to a retarding AC modulated field and collects the resulting modulated signals. The program produces the lock-in treatment in order to demodulate the signals revealing the Auger peaks. It analyzes the spectrum obtained giving the peak positions and energies. Comparison between results of simulation and the experimental data showed good agreement. The peaks of the spectrum obtained depend upon the amplitude, frequency and resolution of the applied modulated signal. The peak shape is effected by the rise time, the slope and the starting potential of the retarding field. 4 figs

[en] Photoelectric observations carried out over a 6-yr interval in the Johnson V-band were analysed for the component frequencies. Five frequencies were found to be definitely present, of which those four of the highest amplitudes agree with the values recently cited in the literature. Although frequency spacing indicates non-radial oscillations, precise mode identification should await more accurate pulsational calculations and/or spectrum line profile analysis. The five-frequency solution describes the observations to an accuracy of the noise level, though small systematic differences do exist in some cases. Light-time effect due to orbital motion is clearly shown to be present in the photoelectric data and indicates that the source of all the observed oscillations is the primary component. (author)

[en] The authors have measured the photoelectron spectra of SiH₃^- and SiD₃^- and report the following electron affinities: EA(SiH₃) = 1.406 +/- 0.014 eV, EA(SiD₃) = 1.386 +/- 0.022 eV. From an analysis of the peak splittings and intensities, we extract potential energy curves for the umbrella mode of the SiH₃^- negative ion and the SiH₃ radical. Both species are pyramidal molecules with inversion barriers of 9000 +/- 2000 cm^-1 for SiH₃^- and 1900 +/- 300 cm^-1 for SiH₃. The bond angle α(H-Si-H) for SiH₃^- is found to be 94.5⁰ while the value for the radical, SiH₃, is 112.5⁰. Using the gas-phase acidity of SiH₄, we obtain the following bond dissociation energy for silane: DH⁰₂₉₈ (H₃Si-H) = 90.3 +/- 2.4 kcal/mol

[en] Two-dimentional clusters, A₄ (four atoms situated at the corners of a square) and A₅ (five atoms with positions at the corners and the centre of a square) adsorbed on a metal surface, have been considered within the framework of the Anderson model. The local densities of states and the effective charges of the atoms are calculated taking into account the direct interaction between them. 4 figs., 7 refs

[en] The electronic structure of the uranium(VI) alkoxide U(OCH₃)₆ has been investigated by using a combination of He I/He II photoelectron spectroscopy and discrete variational (DV) Xα molecular orbital calculations. Good agreement is obtained between the experimental and calculated ionization energies. It is found that the low ionization energy features of the photoelectron spectra are due to varying degrees of donation of the oxygen lone pairs to the empty orbitals on the uranium atom and to the reduction of the molecular symmetry to C/sub i/ via bending of the U-O-C linkages. The methyl groups act as both sigma and π donors to the oxygen 2p orbitals, increasing the overall donor strength of the alkoxide ligands