Yd. Wang et al., ANALYSIS OF FINAL-STATE MOMENTUM DISTRIBUTIONS OF IONIZATION PRODUCTSIN ION-ATOM COLLISIONS, Physical review. A, 53(5), 1996, pp. 3278-3286
A general formulation utilizing three-body kinematics was developed to
analyze the final-state momentum distributions of the electron, the r
ecoil, and the projectile ion, for the ionization process in ion-atom
collisions. Information on ionization dynamics can be identified and a
nalyzed from the perspective of momentum distributions. The mechanism
of electron capture into the projectile continuum was found to contrib
ute a finite value at the kinematical threshold in the longitudinal re
coil-ion momentum distribution. Detailed calculations using the contin
uum distorted wave-eikonal initial state approximation are compared wi
th two recent measurements on momentum distributions of the recoiling
ion and the ionized electron in single ionization of He by protons and
by highly charged projectiles.