Ma. Abdallah et al., OBSERVATION OF AN IMPACT-PARAMETER WINDOW IN LOW-VELOCITY IONIZING COLLISIONS OF NE-MOLECULAR STATES( ON NE PROCEEDING THROUGH QUASI), Physical review. A, 58(5), 1998, pp. 3379-3382
Target ionization in collisions of singly charged Ne+ ions with Ne has
been investigated at projectile velocities from 0.25 to 0.55 a.u. usi
ng electron and recoil momentum imaging techniques. The momentum distr
ibutions of the ejected electrons were found to carry a distinct signa
ture strongly suggesting that ionization is taking place by successive
promotions through molecular orbitals. The observed recoil transverse
momentum distributions are donut-shaped, indicating that single ioniz
ation is confined to a well-defined impact-parameter window. [S1050-29
47(98)50311-3].