Engineering topics

Drukarev, E G

Publications and source records attributed to Drukarev, E G.

3 records

DOE OSTI2012

A new approach to physics of nuclei

We employ the QCD sum rules method for description of nucleons in nuclear matter. We show that this approach provides a consistent formalism for solving various problems of nuclear physics. Such nucleon characteristics as the Dirac effective mass m* and the vector self-energy {Sigma}{sub V} are expressed in terms of the in-medium values of QCD condensates. The values of these parameters at saturation density and the dependence on the baryon density and on the neutron-to-proton density ratio is in agreement with the results, obtained by conventional nuclear physics methods. The contributions to m* and {Sigma}{sub V} are related to observables and do not require phenomenological parameters. The scalar interaction is shown to be determined by the pion-nucleon {sigma} term. The nonlinear behavior of the scalar condensate may appear to provide a possible mechanism of the saturation. The approach provided reasonable results for renormalization of the axial coupling constant, for the contribution of the strong interactions to the neutron-proton mass difference and for the behavior of the structure functions of the in-medium nucleon. The approach enables to solve the problems which are difficult or unaccessible for conventional nuclear physics methods. The method provides guidelines for building the nuclear forces. The three-body interactions emerge within the method in a natural way. Their rigorous calculation will be possible in the framework of self-consistent calculation in nuclear matter of the scalar condensate and of the nucleon effective mass m*.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗

DOE OSTI2011

Erratum: Low-energy K-shell Compton scattering [Phys. Rev. A 82, 023404 (2010)]

The first sentence of the Abstract should be as follows: We calculate the photon energy distribution and the total cross section for the Compton scattering on the K electrons for the case when the photon wavelength is much larger than the size of the K shell. The first sentence of the Summary should be as follows: We calculated the energy distributions and the total cross section for the Compton scattering on the K-shell electrons in the low-energy region, determined by Eq. (2), i.e., for the case when the wavelength of the photons is much larger than the size of the K shell.

74 ATOMIC AND MOLECULAR PHYSICS↗

DOE OSTI2010

Low-energy K-shell Compton scattering

We calculate the photon energy distribution and the total cross section for the Compton scattering on the K electrons for the case when the photon wave length is much smaller than the size of the K shell. We show that at the energies of the order of the binding energy I of the K electron most part of the spectrum is governed by the low-energy behavior. The total cross section has a local maximum at the energies (1.5-2)I, reaching the values of the order 1 barn. At higher photon energies the spectrum curves have two maxima, corresponding to low-energy ejected photons or electrons. The cross sections in the whole region are calculated. The actual calculations are carried out employing the nonrelativistic Coulomb functions, thus being valid for the single-electron atoms. However, the main features of the analysis are expected to be true for many-electron ions and neutral atoms. The results of the present analysis may be useful in calculations of the laser-induced and laser-assisted processes.

74 ATOMIC AND MOLECULAR PHYSICS↗