Optical properties of CdF<Subscript>2</Subscript> in a wide energy range

For either of the two reflection spectra of cadmium difluoride that are known from experiments, a complete set of the fundamental optical functions is calculated in the energy range 4–45 eV with the Kramers-Kronig relationships. The basic features of the optical spectra are established, and a hypothesis for their origin is suggested based on the known theoretical results for the band structure.     

Reaction of 2,3-epoxypropyl alkyl sulfides with carboxylic acids and phenol

Russian Chemical Bulletin -     

The status of MCU-5

The software developed within the framework of the MCU project which implements the Monte Carlo method for solving the transport equations for various kinds of radiation is widely used for calculating nuclear reactors of different types. The final version of MCU-5 is described. The developed libraries of constants are briefly described, and the potentialities of the MCU-5 package modules and the executable codes compiled from them are characterized. Examples of important problems of reactor physics solved with the codes from the MCU family are presented.     

Characteristic electron loss spectra and electronic structure of thallium chloride

The bands, state densities N(E), and permittivity are theoretically found for TlCl crystals. On the basis of the experimental characteristic electron loss spectra, the spectra of the complete set of optical functions including permittivity and bulk electron loss spectra are calculated and decomposed into components. The obtained data are compared with the well-known theoretical results. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 8–11, June, 2008.     

Current Trends in Laser Separation of Isotopes in Monatomic Vapors

A comparative analysis of the techniques of laser isotope separation in monatomic vapors is presented. The restraints inherent in the conventional isotope separation technique AVLIS (atomic vapor laser isotope separation) are discussed as applied to the large-scale production of various isotopes. The requirements that should be met by the chemical reactions are formulated for the use of these reactions in isotope separation. The photochemical technique was shown to be quite competitive with the AVLIS.     

Dielectric Spectra and d-bands Structure of Germanium,Tin, and Lead Tellurides

Russian Physics Journal - The known experimental absorption spectra were used to calculate the dielectric spectra of GeTe, SnTe, and PbTe crystals in the region of electron transitions from the...     

Density and temperature ahead of a cylinder with a thermally insulated wall and a cooled wall in a rarefied hypersonic system

Results are presented of a measurement of density and temperature on the stagnation line of a cylinder in cross flow at Mach number M_∞=5, Knudsen number Kn_∞=0.06?0.33, and with temperature factor varying from 1 to 0.11. The effect of degree of rarefaction and the temperature factor on the structure of the perturbed region ahead of the cylinder has been investigated.     

Synthesis of substituted pyrido[3´,2´:4,5]thieno[3,2-c]isoquinolin-5(6H)-ones and their sulfinyl and sulfonyl derivatives

A method for the synthesis of previously unknown pyrido[3´,2´:4,5]thieno[3,2-c]isoquinolin-5(6H)-ones was suggested, which includes a condensation reaction of substituted 3-cyanopyridine-2(1H)-thiones with methyl 2-(chloromethyl)benzoate and subsequent treatment of the condensation products with potassium tert-butoxide. The oxidation of the condensation products to sulfoxides or sulfones and subsequent treatment of these compounds with potassium tert-butoxide led to substituted pyrido[3´,2´:4,5]thieno[3,2-c]isoquinolin-5(6H)-one 11-oxides or substituted pyrido[3´,2´:4,5]thieno[3,2-c]isoquinolin-5(6H)-one 11,11-dioxides.

     

Measurement of velocity of rarefied gas jets from the drift of an ion marker formed by an electron beam

The physical aspects of the formation of an ion marker in a low-density gas jet are examined. The properties of the method of measuring velocity by using a known base of two double probes to record the flight time of a marker are studied. A comparison of the results of the measurements with data obtained using a pitot tube shows that measurement of the velocity by the indicated method can be conducted not only in the core of a supersonic jet but also in nonisentropic zones of flow under certain conditions.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 1, pp. 88–94, January–February, 1973.     

Experimental study of the flow past entry vehicles with jet-controlled aerodynamic characteristics

A comprehensive aerodynamical investigation of the flow past entry vehicles with spherical segment/backward-facing cone geometry has made it possible to evaluate the efficiency of various active techniques of retrorocket deceleration, to obtain the relationships for calculating the drag force, to establish the salient features of the flow patterns encountered, to reveal their effect on the aerodynamic characteristics of the vehicle, and to determine the ranges of stable flow.Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 3, pp. 115–125, May–June, 1996.