Determination of the strength functions for giant multipole resonances in the semimicroscopic model of nuclear vibrations
Determination of the strength functions for giant multipole resonances in the semimicroscopic model of nuclear vibrations
A.N. Gol'tsov, B.S. Ishkhanov, V.N. Orlin
A method is described for calculating the strength functions for giant multipole resonances (GMR). The fragmentation of particle and hole excitations is taken into accountt as is the coupling of the GMR to the continuum. The method is used to calculate the photoabsorption cross section of the nucleus $^{12}C$.
Show AbstractDiffraction radiation produced during the excitation of cyclotron waves in a relativistic electron beam
Diffraction radiation produced during the excitation of cyclotron waves in a relativistic electron beam
V.I. Kanavets, A.V. Fedorov, V.A. Cherepenin
Diffraction radiation generated when fast and slow cyclotron waves are excited in a relativistic electron beam is examined theoretically. The focusing magnetic field $H_0$ is shown to play a fundamental role in this process and that it can be used to control the amplitudes of radiated harmonics in multimode diffraction generators.
Show AbstractRichardson plot for the (110) plane of a tungsten single crystal
Richardson plot for the (110) plane of a tungsten single crystal
E.E. Azizov, V.A. Mashtakova, B.B. Shishkin
Thermionic emission from the (110) plane of a tungsten single crystal was investigated and it was shown that there is a threshold temperature at which the emission parameters determined from the Richardson plot undergo an increase.
Show AbstractEnhancement of the luminescence of rhodamine 6G in a colloidal solution of silver
Enhancement of the luminescence of rhodamine 6G in a colloidal solution of silver
B.D. Ryzhikov, R.E. Shikhlinskaya
An enhancement of the luminescence and absorption of rhodamine 6G in a colloidal water solution of silver has been found. The enhancement coefficient has been investigated as a function of the optical properties of the colloidal solution, the exciting wavelength, and the thickness of the solution. Electronic resonances in the metal particles are discussed as a possible mechanism of enhancement.
Show AbstractDiffraction of acoustic waves by a half-plane parallel to the free surface of a stratified compressible liquid
Diffraction of acoustic waves by a half-plane parallel to the free surface of a stratified compressible liquid
R.R. Gabdullin, A.K. Shatov
An analysis is given of the diffraction of acoustic waves by a rigid-half plane parallel to the free surface of a stratified compressible liquid. The solution is given in the form of an integral whose asymptotic behavior in the far-field zone is examined.
Show AbstractSecond viscosity in a vibrationally nonequilibrium gas
Second viscosity in a vibrationally nonequilibrium gas
A.I. Osipov, A.V. Uvarov
The relevance of the concept of second viscosity in hydrodynamic processes in a nonequilibrium gas is discussed with allowance for the presence of a pump and heat transfer. It is shown that the second viscosity coefficient may be negative under certain particular conditions but this does not affect the overall positive sign of the total production of entropy in the system.
Show AbstractTransformation from the Mittag-Leffler expansion to the expansion of the potential of an arbitrary body in the region of its analyticity
Transformation from the Mittag-Leffler expansion to the expansion of the potential of an arbitrary body in the region of its analyticity
N.A. Chuikova
A transformation is found between the function 1/(1 - z) of a complex variable, defined a two-dimensional stellar region, to the reciprocal distance $1/\Delta$ that is a function of a real variable defined in three-dimensional space. Formulas relating the coefficients of the expansion of $1/\Delta$ in terms of spherical functions with the coefficients of the Mittag-Leffler expansion of the corresponding complex function 1/(l - z) are derived.
Show AbstractSecular and long-term perturbations of the inner orbit of the multiple system $\xi U.Ma.$
Secular and long-term perturbations of the inner orbit of the multiple system $\xi U.Ma.$
A.A. Orlov, N.A. Solovaya
Perturbations of the inner orbit of the multiple stellar system $\xi U.Ma.$ are calculated usirig formulas derived in previously published papers. Secular changes in the elements $e_1$, $\Omega_1$ and $I_1$ are reported. The results show that the perturbations of the inner orbit are substantial and must be taken into account.
Show AbstractSimulation of back and transmission sputtering of atoms under the ion bombardment of single-crystal and quasiamorphous two-component targets
Simulation of back and transmission sputtering of atoms under the ion bombardment of single-crystal and quasiamorphous two-component targets
V.N. Samoilov, V.A. El'tekov, B. Fritzsch, N.G. Anan'eva
A dynamic model of a block of atoms is used to compare the sputtering parameters of two-component single-crystal and amorphous targets. The simulation is performed for the case of ion bombardment of the (0001) plane of VSi$_2$ single crystal and a corresponding quasiamorphous target with Ne$^+$ ions with energies of 10 keV, incident normally.
Show AbstractMass formulas for charmed baryons
Mass formulas for charmed baryons
L. Gelmi, V.S. Zamiralov, S.N. Lepshokov
The hypothesis of quark-biquark structure of ordinary and charmed baryons can be used to express unambiguously the constants in the mass formulas of the quark models with flavors u, d, s, c in terms of the F- and D-coupling constants in the baryonic symmetry SU(4). The result is generalized to SU(n) symmetry.
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