Charge asymmetry in alignment of atoms excited by protons and antiprotons

Characteristic X-ray radiation and Auger electrons from resonant coherently excited highly charged ions under channeling

“…Recently we showed in detail [8], how certain geometrical properties of the in-crystal electric field manifest themselves in the angular anisotropy of the 2 characteristic X-ray radiation from resonant coherently excited ions. Usually, following Komaki et al [9], planar-channeling RCE is treated in the ion rest frame (x, y, z) which x axis is directed along the beam and z axis is perpendicular to the channel.…”

“…Usually, following Komaki et al [9], planar-channeling RCE is treated in the ion rest frame (x, y, z) which x axis is directed along the beam and z axis is perpendicular to the channel. One of the results of the paper [8] is that RCE on a single (k, l) resonance can be most conveniently treated in a special coordinate system, where its X axis is determined by the Lorentz transformation of the corresponding harmonic of the field into its both scalar ϕ( r ′ , t ′ ) and vector A( r ′ , t ′ ) components in the ion rest frame while the Z axis remains perpendicular to the channeling plane. To show the main idea of [8] in this short presentation, we neglect here all effects of the vector potential induced in the ion rest frame and, using the dipole approximation for the electric field in this frame, take a projection of its vector E on the channeling plane for the direction of axis X.…”