DIFFERENTIAL CROSS-SECTIONS OF ATOMIC AU FOR ELECTRON-SCATTERING (30-200 EV)

Differential cross sections for elastic scattering and for excitation of the 2P1/2 and 2P3/2 states of atomic gold have been measured with an angle resolving electron spectrometer. The primary energy extended from 30 to 200 eV and the scattering angle from 5 to 140'. The energy and angle resolutions were about 80 meV and 1' FWHM respectively. The measured relative cross sections are in good agreement with theory. Absolute values were derived by normalisation against Ar and Cu cross sections. They were found to be about three to ten times larger than those predicted by different theories.