Correlation effects on double electron capture in highlycharged, lowenergy ionatom collisions
Abstract
The method of zerodegree Auger electron spectroscopy has been used to study twoelectron excited states populated in slow double capture collisions of highly charged ions with He and H sub 2. The focus of this study is on production of autoionization electrons originating from the nonequivalent 1s (2) 2 pnl electron configurations in comparison with electron production resulting from the Auger decay of (near) equivalent 1s(2) 2 pnl (with n approx. n') configurations. It is shown that production of nonequivalent electron configurations is significant and involves electronelectron correlation effects whose analysis leads beyond the independentparticle model. Recent results that include a measurement at nonzero angles are presented to illustrate the angular dependence of electron emission from nonequivalent electron configurations, as well as the dependence on projectile charge state and target species. Comparison of high resolution scans over two lines of the 1s(2) 2pnl sequence for the O(6+)+He system with accurate transition energy calculations shows preferential population of high angular momentum substation.
 Publication:

Presented at the 15th International Conference on the Physics of Electronic and Atomic Collisions
 Pub Date:
 1987
 Bibcode:
 1987peac.conf.....M
 Keywords:

 Atoms;
 Autoionization;
 Correlation;
 Electron Capture;
 Electron Capture;
 Ions;
 Particle Collisions;
 Auger Spectroscopy;
 Electron Spectroscopy;
 Excitation;
 Helium;
 Hydrogen;
 Atomic and Molecular Physics