LOW-ENERGY STRUCTURE IN THE ELECTRON CONTINUA FROM LI-NE AND NA+-NE COLLISIONS()

Electron spectra from 20 and 50 keV Li+-Ne and 25, 40, 50, and 60 keV Na+-Ne collisions have been measured at ejection angles of 20-160 degr ees, and at electron energies down to 1.6 eV. In both collision system s, a low-energy structure is observed at energies below 5 eV superimpo sed on a broad continuum. It is proposed that the low-energy structure may be due to electrons promoted to the continuum via the so-called T promotion associated with 'saddle-point' electrons.