Mapping the xenon (e ,2e) differential cross section from coplanar to perpendicular geometries

摘要

Differential cross sections for xenon are presented for low-energy (e,2e) measurements under doubly symmetric kinematics, for incident energies between 5 and 40 eV above the ionization threshold. A range of geometries were investigated from coplanar through to the perpendicular plane, with the outgoing electrons having equal energies and angles. The cross sections were monitored as the geometry changed, in order to identify the evolution of the observed structures. The data for an excess energy of 10 eV are compared to theory, and significant differences are found. Further calculations are required to aid in interpretation of the full range of cross sections that have been measured.