Scattered electrons

Lineshape analysis of keV electrons scattered from hydrogen molecules

Accurate measurements of keV electrons scattered elastically from H2 molecules reveal a lineshape that is an intrinsic property of the target. The intrinsic width of the elastic peak is due to the non-zero momentum of a proton bound to a molecule. A more precise analysis of the lineshape shows that it deviates from Gaussian. This deviation is shown to be a consequence of the dominance of the mo...

Effects of bonding on the energy distribution of electrons scattered elastically at high momentum transfer

High-resolution measurements of 40-keV electrons scattered over 44.3° from evaporated carbon films are presented. The observed width of the energy distribution of electrons scattered from carbon is significantly larger than the experimental energy resolution, and its position is shifted to lower energy. Measurements were done for transmission and reflection geometries for thin films with thickn...

Plateau Effects in the Spectra of Electrons Scattered from Atoms in a Strong Laser Field

Spin Polarisation of Electrons Scattered Superelastically by Laser-excited Na Atoms

We have measured the spin polarisation of electrons scattered superelastically from laser-excited Na atoms at a collision energy of 20 eV and a scattering angle of 30’. The measured spin polarisation is 0.095 zt0.048 for scattering from the 3p zPl/z excited state of Na. The polarisation changes sign if the laser is tuned to the 3p 2P3,z state, as is expected on formal grounds. We also present c...

Spin polarization and cross sections of electrons elastically scattered from heavy alkaline-earth atoms

Semi-relativistic approach is employed to compute the differential and integrated cross sections, spin polarization P and the spin polarization parameters T and U for the scattering of electrons from barium and strontium atoms in the energy range from 2.0-300 eV. The projectile-target interaction is represented both by real and complex optical potential in the solution of Dirac equation for the...