Development of technique for synthesis of methyl(β-oxyethyl) sulfide by the reaction of ethylene oxide with methyl mercaptan

Reaction of ethylene oxide with methyl mercaptan in the presence of a catalyst, a solution of potassium hydroxide in methyl(β-oxyethyl) sulfide, was studied. Various technological procedures for synthesis of methyl(β-oxyethyl) sulfide were analyzed. The process conditions providing a 98–99% conversion of the starting reagents at a selectivity of 97–98% were suggested.     

Integrable Model of Interacting Elliptic Tops

We suggest a method for constructing a system of interacting elliptic tops. It is integrable and symplectomorphic to the Calogero-Moser model by construction. __________ Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 146, No. 1, pp. 55–64, January, 2006.     

On the angular distribution of extensive air showers

Angular distributions of extensive air showers with different number of charged particles in the range 2.5 × 10⁵–4 × 10⁷ are derived using the experimental data obtained with the EAS MSU array. Possible approximations of the obtained distributions with different empiric functions available in literature, are analyzed. It is shown that the exponential function provides the best approximation of the angular distributions in the sense of the χ² criterion.     

Search for sources of cosmic rays in the region of the knee: Part II

This paper reports on new results obtained from analyzing the arrival directions of extensive air showers detected at the Prototip ShAL-1000 array in the period from the end of August 1997 to February 2001. The results are examined using the method proposed by Alexandreas and colleagues, which has been widely employed for analyzing the data obtained from other experiments. The existence of the previously revealed zones with an excessive flux of cosmic rays at energies in the range of the knee and the closeness of the coordinates of these zones to those of the possible astrophysical cosmic-ray sources are confirmed.     

Heavy quark and quarkonium production at CERN LEP2: <Emphasis Type="Italic">k</Emphasis><Subscript>T</Subscript>-factorization versus data

We present calculations of heavy quark and quarkonium production at CERN LEP2 in the k _T-factorization QCD approach. Both direct and resolved photon contributions are taken into account. A conservative error analysis is performed. The unintegrated gluon distribution in the photon is obtained from the full CCFM evolution equation. The traditional color-singlet mechanism to describe the non-perturbative transition of a -pair into a final quarkonium is used. Our analysis covers the polarization properties of heavy quarkonia at moderate and large transverse momenta. We find that the total and differential open charm production cross sections are consistent with the recent experimental data taken by the L3, OPAL and ALEPH collaborations. At the same time the DELPHI data for the inclusive production exceed our predictions, but experimental uncertainties are too large to claim a significant inconsistency. The bottom production in photon-photon collisions at CERN LEP2 is hard to explain within the k _T-factorization formalism.Received: 22 December 2004, Revised: 15 February 2005, Published online: 12 April 2005     

Acoustic response accompanying stimulated Brillouin scattering in liquid

Sound waves propagating from the stimulated Brillouin scattering (SBS) region in hexane were detected. A signal correlating with the SBS process existence in liquid was detected in the direction perpendicular to propagation of waves interacting in SBS using a broadband receiver of acoustic vibrations.     

Temperature dependences of the Young's modulus and internal friction of heat-treated silicon

The internal friction and Young's modulus were determined from the damping of free bending vibrations at 0.2–5 kHz between 20 °C and 700 °C. The activation energy for the processes responsible for the appearance of the relaxation peaks was determined from the frequency shift of these peaks. The diffusion coefficient of Cu in Si was determined by the internal-friction method in this temperature range. The results found from the internal-friction measurements are compared with data from studies of electrical properties.Translated from Izvestiya VUZ. Fizika, No. 3, pp. 113–118, March, 1970.The authors thank R. Sh. Ibragimov, É. N. Lebedinskaya, and A. K. Zakharov for assistance in this study.