One-electron capture with simultaneous ionization in Cq+, Oq+ (q = 1-4)-Ar collisions
Abstract
The ratios Rk1 of k-fold to single ionization of the target atom with simultaneous one-electron capture by the projectile have been measured for 15-480 keV/u (vp=0.8-4.4[thin space]a.u.) collisions of Cq+, Oq+ (q = 1-4) with Ar, using time-of-flight techniques which allowed the simultaneous identification of the final charge state of both the low-velocity recoil ion and the high-velocity projectile for each collision event. The present ratios are similar to those for He+ and He2+ ion impact. The energy dependence of Rk1 shows a maximum at a certain energy, Emax, which approximately conforms to the q1/2-dependence scaling. For a fixed projectile state, the ratios Rk1 also vary strongly with outgoing reaction channels. The general behavior of the measured data can be qualitatively analyzed by a simple impact-parameter, independent-electron model.
- Publication:
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International Journal of Mass Spectrometry
- Pub Date:
- August 2009
- DOI:
- 10.1016/j.ijms.2009.06.001
- Bibcode:
- 2009IJMSp.285..157D
- Keywords:
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- Ion-atom collision;
- Coincidence measurement;
- Transfer;
- Ionization;
- Independent-electron approximation