A method for determining the mean translational energy of particles desorbed from solid surfaces

A method for determinig the mean molecular translational energy in gas flows of low intensity (10¹²–10¹⁴ molec. s^–1) has been proposed. The method was verified using various gases (H₂, N₂, O₂, and CO₂ flowing into a vacuum out of a heated capillary. The translational energies were determined for CO and N₂ molecules desorbing from the surface of polycrystalline Ir. The translational temperature (T _tr) measured for CO equals 650±90 K and almost coincides with the surface temperature (T _s = 600 K). In the case of nitrogen molecules,T _tr = 4600±500 K atT _s = 500 K. The method proposed is applicable to the determination of the spatial distribution of molecular beam particles.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 30–34, January, 1995.The authors express their gratitude to A. V. Sklyarov for fruitful discussions during the elaboration of the theoretical basis and technical realization of the method.The reseach was carried out with the partial financial support of the International Science Foundation (Grant MBN 000).     

Convergence generated by analytic functionals,and isomorphism of algebras of analytic functions

Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 40, No. 6, pp. 799–803, November–December, 1988.     

Kinetic Energy of Methane Molecules Formed from Methyl Radicals Adsorbed on Copper

The method of temperature-programmed reaction (TPR) with the spatial resolution of desorbed product molecules and the measurements of their average rates (v) are used to study the transformation of methyl radicals adsorbed on polycrystalline copper. In the products of TPR, only methane is found. The spatial distribution of its desorption flow (SDDF) is described by the equation CH₃ ^·. The results of SDDF and I/I ₀= cos¹⁶ measurements agree with each other. Under these conditions, translationally excited methane molecules are desorbed from the copper surface. The energy of these molecules is 10–15 times higher than the thermal energy.     

Friction properties of physically modified polymers

The effectiveness of using physical methods of modifying the surface layers of polymers in order to improve their friction properties is demonstrated.Institute of Mechanics of Metal—Polymer Systems, Academy of Sciences of the Belorussian SSR, Gomel'. L. Ya.Karpov Scientific-Research Physicochemical Institute, Moscow. Translated from Mekhanika Polimerov, No. 5, pp. 839–842, September–October, 1974.     

Self-propagating high-temperature synthesis as a promising method for the utilization of technical lignins

The self-propagating high-temperature synthesis method has been used for technical lignin utilization after long-term storage under atmosphere conditions. For the first time a new allotropic form of carbon, carbonized lignin, has been obtained and analyzed. It has been shown that, in terms of its parameters (dispersity, surface groups), the carbonized lignin is a suitable alternative to conventional brands of technical carbon in resin compounds.     

Generation of Boron Ions for Beam and Plasma Technologies

Russian Physics Journal - The urgency of the study of generation of beams and plasmas containing boron ions is caused by their application in ion-beam and plasma technologies of modification of the...     

Laser ablation of metals in liquids: A method for producing Au and Cu colloid systems

A comprehensive study of laser ablation in liquids is performed. The use of iron, gold, copper, and magnesium nanoparticles in medicine is shown. The results from studying gold and copper colloid systems synthesized using the second harmonic of a Nd:YAG laser are reported.     

Generation of High Charge State Metal Ions in an Arc Plasma

Russian Physics Journal - Generation of high charge state metal ions in arc plasma is investigated and methods of elevation of the average ion charge state are analyzed. To realize multiple...