Open AccessУравнения для импульса и энергии рентгеновского волнового поля в кристалле
Author(s) -
A. A. Dyshekov
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.19.46689.17435
Subject(s) - physics , energy–momentum relation , momentum (technical analysis) , electromagnetic field , electromagnetic radiation , tensor (intrinsic definition) , classical mechanics , plane wave , stress–energy tensor , quantum electrodynamics , optics , quantum mechanics , mathematics , geometry , exact solutions in general relativity , finance , economics
A new approach for describing the interaction of X rays with a crystalline medium is proposed. General relations for a change in the electromagnetic-field momentum and energy have been derived for a nonmagnetic medium with variable permittivity. A special local coordinate system for an inhomogeneous medium is introduced, in which the Maxwell tension tensor has a canonical form determined by the energy and momentum densities. Main relations for changes in the energy and momentum densities have been obtained in the coordinate system related to the propagation direction of a plane electromagnetic wave pulse in a homogeneous medium.