M. Abdallah et al., VELOCITY-SPACE PICTURES OF CONTINUUM ELECTRONS PRODUCED BY SLOW, BARE, HIGHLY-CHARGED IONS, Physical review. A, 56(3), 1997, pp. 2000-2004
Velocity-space pictures of the electron continua produced by the impac
t of ions on He and Ne have been measured for the bare projectiles of
p, He, C, O, and Ne at a projectile velocity of 1.63 a.u. For the thre
e highly charged projectiles, this velocity lies in the ionization ''t
hreshold'' region where electron capture dominates the reaction, The e
lectron velocity-space distributions for these cases are concentrated
near the velocity of the projectile, not near the saddle-point velocit
y, and seem to ''saturate'' at a nearly universal shape. The data are
in qualitative agreement with CDW-EIS calculations.