The A-dependence of J/ψ-particle inclusive distributions

The differential cross sections $\text{d}\text{σ}\text{d}\text{x}$ and $\text{d}\text{σ}\text{d}\text{p}{}_{\mathrm{t}}{}^2$ of inclusive J/ψ production by 43 GeV/c π^? off Be, Cu and W nuclei have been measured. Fitting $\text{d}\text{σ}\text{d}\text{p}{}_{\mathrm{t}}{}^2\text{～ A}{}^{\mathrm{\alpha }}\text{(p}{}_{\mathrm{t}}{}^2\text{)}$ we observed the increase of α with p_t².     

Excitation of electroluminescence in alkali halide compounds

In ionic crystals the concentration of free carriers and the mean free path are usually small and the forbidden band is large. The field energy is in the main spent on heating the crystal. Therefore, it is difficult to accelerate an appreciable number of electrons to the energy necessary for the excitation of electroluminescence.One can overcome these difficulties by removing a thin layer of the luminophore. With the decrease in the layer thickness the development of the cascade breakdown becomes more difficult, and the thermal exchange with the electrodes becomes better. This makes it possible to increase the field up to the values necessary for tunnel ionization of the luminescence centres.We found electroluminescence of the sublimated layer of CsI-Tl.     

Calculation of the heat of explosion

Summary A method has been proposed for calculation of the heat of explosion of individual explosive materials.     

Mass-spectrometric study of the cyclization of diazo ketones. 1. Cyclization of 1-diazo-3-sulfonylaminopropan-2-ones to N-sulfonylazetidin-3-ones

A comparison of the mass spectra of 1-diazo-3-sulfonylaminopropan-2-ones and N-sulfonylazetidin-3-ones makes it possible to conclude that under the conditions of electron impact and chemical ionization the molecular ions of diazo ketones lose a molecule of nitrogen and undergo partial cyclization to the corresponding azetidinones without undergoing the Wolff rearrangement.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 334–342, March, 1982.     

Boundary effects on chaotic advection-diffusion chemical reactions

A theory of a fast binary chemical reaction, A+B-->C, in a statistically stationary bounded chaotic flow at large Peclet number Pe and large Damk?hler number Da is described. The first stage correspondent to formation of the developed lamellar structure in the bulk part of the flow is terminated by an exponential decay, proportional, variant exp((-lambdat) (where lambda is the Lyapunov exponent of the flow), of the chemicals in the bulk. The second and the third stages are due to the chemicals remaining in the boundary region. During the second stage, the amounts of A and B decay proportional, variant 1/sqrt[t], whereas the decay law during the third stage is exponential, proportional, variant exp((-gammat), where gamma approximately lambda/sqrt[Pe].     

Dynamics and damping of electromagnetic solitons in the carbon nanotube bundles

The possible existence of the electromagnetic solitons in carbon nanotubes is analyzed. Solitons appear as a result of a simultaneous change in the classical electron distribution function and the electric field produced by the nonequilibrium electrons in carbon nanotube. The effective equations are obtained for the dynamics of electromagnetic field with allowance for the interband transitions causing soliton damping. The numerical results are presented evidencing the existence of solitons in carbon nanotubes. The propagation dynamics is studied for the periodic electromagnetic waves in the bundles of carbon nanotubes. The shape of electromagnetic wave is found to change during its propagation.