Accurate eigenvalues and eigenfunctions of a two-level system interacting with a one-mode quantum field are calculated numerically. A special iteration procedure based on the operator method permitsâ€¦ (More)

Acta crystallographica. Section A, Foundations ofâ€¦

2002

A novel method for the calculation of the X-ray susceptibility of a crystal in a wide range of radiation wavelengths is described. An analytical interpolation of one-electron wave functions is builtâ€¦ (More)

Known schemes of coherent X-ray and gamma-ray sources are basically connected with the creation of the conditions, when resonant transitions of MSssbauer nuclei or the internal electron shell ofâ€¦ (More)

The self-localized quasi-particle excitation of the electron-positron field (EPF) is found for the first time in the framework of a standard form of the quantum electrodynamics. This state isâ€¦ (More)

In the presence of texture, the concept of X-ray elastic constants as well as Sin 2 Ïˆ law is inapplicable and the X-ray stress factors (XSF) connecting average strain and stress have to be usedâ€¦ (More)

When a non-relativistic particle interacts with a scalar quantum field, the standard perturbation theory leads to a dependence of the energy of its ground state on an undefined parameterâ€”â€œmomentumâ€¦ (More)

Acta crystallographica. Section A, Foundations ofâ€¦

2001

The intensity of coherent X-radiation (CXR) from a relativistic electron beam interacting with the crystal [Feranchuk, Ulyanenkov, Harada & Spence (2000). Phys. Rev. E, 62, 4225-4234] is studied inâ€¦ (More)

2014 The detailed theory of parametric X-rays from charged particles in a crystal is considered. It is shown that this radiation is due to the diffraction of the particleâ€™s electromagnetic field.â€¦ (More)

2014 The numerical calculation of the parametric X-ray spectral and angular distributions for different crystals is performed. Their dependence on the particle energy is discussed. J. Physique 46â€¦ (More)