No abstract available

[en] This symposium on various aspects in atomic physics, collision phenomena, surface physics and particle beams consisted of invited lectures, overview lectures and poster sessions. 74 papers of the presentations are presented in the proceedings. The session headings are: Properties and production of ions and neutrals. Ion - neutral interactions. Properties of clusters. Surface and solid state. Excited atoms and molecules. (A.N.)

[en] The intensity distribution of all observable helium lines in a cylindrical hollow cathode is studied as dependent on the radial distance from the axis, the discharge current and the discharge pressure. The results show that the hollow cathode is a suitable instrument to excite high-lying states of atoms and ions due to the nonlinearity of the parameters governing the population of such states near the axis. In atomic lines the three body recombination into excited states seems to play a decisive role, especially for the high-lying states near the ionization limit. For ionic lines the favorable geometry gives a high excitation rate near the axis due to the 1/r density increase of very fast unscattered electrons. Both effects are important for the development of the hollow cathode as a laser light source. (Auth.)

[en] A radially moveable hollow cathode discharge was used to determine the light intensity distribution of atomic and ionic resonance lines in a discharge in He, Ne, Ar, Kr, Xe, H₂, O₂, N₂ and He-Xe in the wavelength region 30-160 nm. Results are given for He, Ar, Kr, Xe and He-Xe. (Auth.)

[en] 71 papers are presented on subject matters indicated in the section headings: 1) Ion-neutral and neutral-neutral interactions in the gas phase; 2) Laser physics and photonics; 3) Electron collisions and electronic capture; 4) Ion-surface interaction and plasma-related effects; 5) Cluster physics. 70 thereof are of INIS interested and are treated separately. (G.Q.)

[en] A newly built Selected Ion Flow Tube (SIFT) was used to determine rate coefficients for the quenching of the vibration of N₂⁺ (v not equal to 0) by Ne, O₂, N₂, NO and CO₂ for which values of 0.045; 1.2; 5; <= 0.3 and < 1 (all in units of 10^-10 cm³ sec^-1) were obtained. (Auth.)

No abstract available

[en] The reaction with H₂O is a major source of the redistribution of ionic species within a low pressure discharge. Traces of H₂O are usually liberated from the cathode surface by ionic impact. As the ionic energy may be several eV (at the glow edge in a hollow cathode for instance), the product distribution of the reactions with water should be known at least in the region from thermal up to some eV c.m. energy. In order to evaluate the branching ratios of the reactions of Ar⁺ + H₂O and Ne⁺ and H₂O under discharge conditions, a radially moveable hollow cathode (HCD) was used. From the radial distributions of the ion densities, steady state conditions were derived for each ion species from which the reaction rate constants and the branching ratios were derived. (Auth.)

[en] The research topics in the institute were 1) State selected ion neutral interactions. 2) Vibrational temperature of ions. 3) Interstellar molecular synthesis. 4) Radiation damage in solids. 5) Excitation in ion-molecule and ion-atom collisions. 6) Hollow-cathode discharges. (Author)

No abstract available