Two-electron capture and stabilization in collisions of C6+ with rare-gas targets at low energy

We measured the probability R2s for two electrons to be captured and to remain on the projectile ion during collisions between slow C6+ ions and rare-gas targets. The dependence of R2s values of these systems on the incident ion velocities has been studied. For He, Ne, and Xe targets, we have obtained high R2s values at a projectile energy of 12 keV and a decrease of R2s value for increasing projectile energy. The measured R2s values in collisions on He are compared with the data evaluated from Auger electron spectra. copyright 1996 The American Physical Society