TY  - JOUR
A1  - Avilov, Anatoly S.
A1  - Kulygin, Alexander K.
A1  - Pietsch, Ullrich
A1  - Spence, John C. H.
A1  - Tsirelson, Vladimir G.
A1  - Zuo, Ming J.
T1  - Scanning system for high-energy electron diffractometry
Y1  - 1999
UR  - http://www3.interscience.wiley.com/journal/118518709/home?CRETRY=1&SRETRY=0
U6  - https://doi.org/10.1107/S0021889899006755
SN  - 0021-8898
ER  - 
TY  - JOUR
A1  - Avilov, Anatoly S.
A1  - Lepeshov, G. G.
A1  - Pietsch, Ullrich
A1  - Tsirelson, Vladimir G.
T1  - Multipole analysis of the electron density and electrostatic potential in Germanium by high-resolution electron diffraction
Y1  - 2001
SN  - 0022-3697
ER  - 
TY  - JOUR
A1  - Gorfman, S. V.
A1  - Tsirelson, Vladimir G.
A1  - Pietsch, Ullrich
T1  - X-ray diffraction by a crystal in a permanent external electric field : general considerations
N2  - The variations of X-ray diffraction intensities from a crystal in the presence of a permanent external electric field is modeled analytically using a first-order stationary perturbation theory. The change in a crystal, induced by an external electric field, is separated into two contributions. The first one is related to a pure polarization of an electron subsystem, while the second contribution can be reduced to the displacements of the rigid pseudoatoms from their equilibrium positions. It is shown that a change of the X-ray diffraction intensities mainly originates from the second contribution, while the influence of the pure polarization of a crystal electron subsystem is negligibly small. The quantities restored from an X-ray diffraction experiment in the presence of an external electric field were analyzed in detail in terms of a rigid pseudoatomic model of electron density and harmonic approximation for the atomic thermal motion. Explicit relationships are derived that link the properties of phonon spectra with E-field-induced variations of a structure factor, pseudoatomic displacements and piezoelectric strains. The displacements can be numerically estimated using a model of independent atomic motion if the Debye - Waller factors and pseudoatomic charges are known either from a previous single-crystal X-ray diffraction study or from density functional theory calculations. The above estimations can be used to develop an optimum strategy for a data collection that avoids the measurements of reflections insensitive to the electric-field-induced variations
Y1  - 2005
SN  - 0108-7673
ER  - 
TY  - JOUR
A1  - Pietsch, Ullrich
A1  - Tsirelson, Vladimir G.
A1  - Gorfan, S. V.
T1  - X-ray scattering amplitude of an atom in a permanent external electric field
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Tsirelson, Vladimir G.
A1  - Abramov, Yury Fedorovich
A1  - Zavodnik, Valerie E.
A1  - Stash, Adam I.
A1  - Belokoneva, Elena L.
A1  - Stahn, Jochen
A1  - Pietsch, Ullrich
A1  - Feil, Dirk
T1  - Critical pionts in a crystal an procrystal
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Tsirelson, Vladimir G.
A1  - Avilov, Anatoly S.
A1  - Lepeshov, G. G.
A1  - Kuligin, A. K.
A1  - Stahn, Jochen
A1  - Pietsch, Ullrich
A1  - Spence, J. C. H.
T1  - Quantitative Analysis of the Inner-Crystal Electrostatic Potential of several Rock-Salt-Structure Crystals Using Accurate Electron-Diffraction Data
Y1  - 2001
SN  - 1089-5647
ER  -