Double capture with simultaneous ionization in He2+ on Ar collisions - art. no. 012703

We have investigated double electron capture with simultaneous target ioniz ation in collisions of 25-keV/amu He-3(2+) projectiles on argon. Doubly dif ferential cross sections for electrons emitted in angles 0 degrees, 20 degr ees, 45 degrees, 90 degrees, 128 degrees, 175 degrees, in coincidence with the neutralized projectiles were obtained. To establish the relative import ance of the double capture channel in the electron emission at the present intermediate impact velocity, differential cross sections for total electro n emission were also measured. A narrow symmetric cusp-shaped structure for electrons with velocity close to the ion velocity, associated with the neu tral emerging projectile, is observed. Binary encounter electrons, masked b y other processes in total emission, are clearly observed for the double ca pture plus ionization channel.