[en] In this paper we demonstrate that the vibrational relaxation rates of molecular ions can be found by analyzing the time behavior of the spectral line intensities in a decaying plasmas

[en] Formulae are derived for the calculation of probabilities vibrational transitions in a diatomic molecular ion following collision with an atom under conditions when the NMassey parameter > 1. The ion-atom interaction potential is of 12-4 type. Deactiveation rate constants of the first vibrational state are calculated for neon ions < σv > sub(1 → 0)sup(Ne) T and helium < σv >sub(1 Y→ 0)sup(He) as well as the values of mean energy transfered in vibrations of these very ions per one collision. Calculation results satisfactorily agree with the experimental data

[en] The spectral line intensities of the Ne 3p-5d transitions are determined experimentally in the aftergrow of a weakly ionized plasma at Ne pressure 2-90 torr, electron density (5-50) x 10 to the 10th/cu cm, and electron temperature 300-8300 K by the method of Ivanov and Sukhomlinov (1983). The results are presented graphically and characterized in detail, with a focus on dissociative recombination processes. Vibrational relaxation of highly excited Ne2(+) ions due to inelastic collisions with Ne atoms is observed at degree of ionization 10 to the -7th and pressure 30 torr or greater, and the vibrational levels with i = 13 or greater are found to have a rate constant of about 2.5 x 10 to the -14th cu cm/s. 11 references

[en] The analytic theory of backscattering of light ions by surfaces of amorphous solids has been developed for cases of multicomponent materials and materials with depth-variable concentrations of some its components. Analytic formulas for distribution functions of the backscattered light ion flux have been obtained on the basis of the kinetic Boltzmann equation for multicomponent materials and for solids whose atomic densities have been changed with depth. It has been found that the reflection coefficient of ions has decreased with increasing of the atomic density of solid with distance from the surface

[en] The method for determining average over the discharge cross section electron density anti nsub(e)(t) and electron temperature Tsub((e))(t) in a decaying plasma based on current i(t) measurements through the discharge gap at the superposition of a weak electric field is suggested. For finding anti nsub(e)(t) and Tsub(e)(t) the measurement of current i(t) and field intensity is required. The experimental checking of the method carried out under maximum ''pure'' conditions of absence of nonuniform heating up of gas and effect of electrons heating up sources quite convincingly demonstrate its possibilities

[en] The paper deals with the elaboration of analytical theory enabling to calculate the distribution function of backscattered low-energy (up to several keV) light ion flux in the amorphous solid under the normal incidence. Model of backscattering process is elaborated. Boltzmann stationary kinetic equation is solved and simple analytical expression for distribution functions is obtained. Good conformity both for distribution functions calculated by the authors of this paper and measured by other scientists, and for coefficients of reflection of particles and energy calculated using this function. The results of the given paper may be used to elaborate new methods of surface diagnostics, calculation methods for spraying coefficients at low energies. 31 refs.; 7 figs

[en] A method is proposed for determining the absolute sputtering coefficients for the components of alloys in a hollow-cathode hydrogen plasma with sputtering particles having energies on the order of several hundred eV, based on the standard spectral-probe method used for determining the selective sputtering coefficients in plasmas of atomic gases. The distribution functions of the particles bombarding the surface of the hollow cathode are calculated. It is shown that the main contribution to sputtering under typical discharge conditions in a hollow cathode gas pressures of several torr, current densities of order 10 mA/cm² is from H³ ions. 15 refs

[en] In this paper, a model of backscattering of the own ion on a solid amorphous or polycrystalline solid at low energy in the case of their normal incidence is presented. On the base of this model the analytical theory for calculation of the distribution function of the backscattered ions is developed. The present calculations of the integral and differential characteristics are in a good agreement with previous experimental data and numerical calculation of the other authors

[en] The physical model self-sputtering of amorphous or polycrystalline solid target by low energy ions at normal incidence and low energy is presented. The analytical theory for calculation of the distribution function for sputtered ions at boundary of the solid target is developed. It is revealed for elements with small and medium masses that atoms sputtered from layer lying near by surface can not leave solid. The particle and energy sputtering coefficients and energy and angle distributions for many elements (from Be to W) are calculated. The obtained results are in a good agreement with previous experimental and numerical data

[en] The advantages of a method of hollow-cathode discharge for modelling sputtering of the first wall of a fusion reactor, are discussed. The results of the theory of sputtered atom motion to a probe in the diffusion mode and formulae for calculation of the fracture of cathode-sputtered atoms arriving on the probe are presented. The relations are given for determination of the selective coefficients of sputtering of material components and their concentration in spectral-probe investigation