Velocity space "snapshots" of continuum electrons produced by slow, bare, highly charged ions: saddle-point electrons?

Momentum Images of Continuum Electrons fromHe+andHe2+Abdallah1, Cocke2, Wolff3 et al. 1998Phys. Rev. Lett.352240View full textAdd to dashboardCite

“…Black rectangles represent the appropriate experimental resolutions in the images. The electrons are seen to be preferentially emitted in the forward direction, lying between the target and projectile velocities in agreement with earlier investigations of similar systems [9][10][11][12]. Figure 2(b) shows that electrons are concentrated in the scattering plane.…”

“…They were able to deduce, from soft electron spectra extending down to zero energy, evidence for the operation of both T and S processes. More recent electron momentum imaging of the continuum electron spectra showed that, while the soft electron continua tend to gather about the saddle for slow singly charged projectiles on He, they do not do so for higher charged projectiles [9][10][11].…”