Construction of Filled Hill for Downhill Ski Racing Complex in Moscow

In 1997-2002 large scope soil excavations for construction of Business Center ‘Moscow-City’, Third Highway Circle and other large structures with deep foundations were carried out in Moscow. The soil excavated out of 180,000.00 m³ pits was dumped on a disposal site originally designed as a temporary soil storage site in the Southwestern suburbs of Moscow. Snow, ice and clots of frozen soil were left untouched and piling was effected over the frozen surface. This spoil heap was a mass of exceedingly wet sandy clay heterogeneous as to composition and density with low strength and deformation properties, including crushed concrete and bricks and tended to land sliding and self-compaction deformations. Erection of the hill can be divided into four stages, judging by differences in physic-mechanical properties of soils down the depth of the embankment (Fig. 1). Upon fulfillment of the 2nd stage of excavation (Fig. 1 ‘b’) at the end of the year 2001 the absolute mark of the top of the slope has reached 222 m, with the natural relief surface mid-mark making 177-178 m prior to heap excavation, and a heap height from its cone base has made 45 m. At the same time it was decided to use that hill as a standing ski-racing complex with a ski-jump. At the stage ‘b’ (Fig. 1) prospectors have made studies of physic-mechanical properties of the entire mass of fill-up soils and natural lower stratum as well by well-boring and static probing of soils for the ski-racing complex project design

On the reliability of the theoretical internal conversion coefficients

Possible sources of uncertainties in the calculations of the internal conversion coefficients are studied. The uncertainties induced by them are estimated.Comment: 16 pages (including 3 figures inserted by 'epsfig' macro

Image and Spectrum of the Sun in the Region 9.5-200 Angstrom

Short wave ultraviolet image and spectrum of sun obtained during course of X-ray flar

Deuteron tensor polarization component T_20(Q^2) as a crucial test for deuteron wave functions

The deuteron tensor polarization component T_20(Q^2) is calculated by relativistic Hamiltonian dynamics approach. It is shown that in the range of momentum transfers available in to-day experiments, relativistic effects, meson exchange currents and the choice of nucleon electromagnetic form factors almost do not influence the value of T_20(Q^2). At the same time, this value depends strongly on the actual form of the deuteron wave function, that is on the model of NN-interaction in deuteron. So the existing data for T_20(Q^2) provide a crucial test for deuteron wave functions.Comment: 11 pages, 3 figure

Lamb shift in muonic deuterium atom

We present new investigation of the Lamb shift (2P_{1/2}-2S_{1/2}) in muonic deuterium (mu d) atom using the three-dimensional quasipotential method in quantum electrodynamics. The vacuum polarization, nuclear structure and recoil effects are calculated with the account of contributions of orders alpha^3, alpha^4, alpha^5 and alpha^6. The results are compared with earlier performed calculations. The obtained numerical value of the Lamb shift 202.4139 meV can be considered as a reliable estimate for the comparison with forthcoming experimental data.Comment: 24 pages, 11 figures. arXiv admin note: text overlap with arXiv:hep-ph/061229

Analytical Form of the Deuteron Wave Function Calculated within the Dispersion Approach

We present a convenient analytical parametrization of the deuteron wave function calculated within dispersion approach as a discrete superposition of Yukawa-type functions, in both configuration and momentum spaces.Comment: 3 pages, 2 figure; several minor corrections adde

Creation and decay of eta-mesic nuclei

First experimental results on photoproduction of eta-mesic nuclei are analyzed. In an experiment performed at the 1 GeV electron synchrotron of the Lebedev Physical Institute, correlated pi+n pairs arising from the reaction gamma + 12C -> N + eta(A-1) -> N + pi+ + n + (A-2) and flying transversely to the photon beam have been observed. When the photon energy exceeds the eta-meson production threshold, a distribution of the pi+n pairs over their total energy is found to have a peak in the subthreshold region of the internal-conversion process eta p -> pi+ n which signals about formation of eta-mesic nuclei.Comment: 6 pages, 6 figures. Talk at CIPANP, May 2000, Quebe

Ground State Hyperfine Structure of Muonic Helium Atom

On the basis of the perturbation theory in the fine structure constant $\alpha$ and the ratio of the electron to muon masses we calculate one-loop vacuum polarization and electron vertex corrections and the nuclear structure corrections to the hyperfine splitting of the ground state of muonic helium atom $(\mu e ^4_2He)$. We obtain total result for the ground state hyperfine splitting $\Delta \nu^{hfs}=4465.526$ MHz which improves the previous calculation of Lakdawala and Mohr due to the account of new corrections. The remaining difference between the theoretical result and experimental value of the hyperfine splitting equal to 0.522 MHz lies in the range of theoretical error and requires the subsequent investigation of higher order corrections.Comment: Talk presented at the scientific session-conference of Nuclear Physics Department RAS "Physics of fundamental interactions", 25-30 November 2007, ITEP, Moscow, 18 pages, 5 figure