Transfer excitation in slow collisions between ions of very high charge and two-electron targets
- 1 March 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 43 (5) , 2306-2310
- https://doi.org/10.1103/physreva.43.2306
Abstract
We argue that a three-step transfer-excitation (capture and target excitation) mechanism enhances (depletes) the cross section for one- (two-) electron removal from a two-electron target. This mechanism, which becomes very important at high projectile charge (q), is mediated through quasimolecular couplings between diabatic double-capture and transfer-excitation channels, in which the inner of two active electrons is transferred to an excited target state. The inclusion of this process in the extended classical over-barrier model gives excellent agreement with unexplained experimental cross sections for one- and two-electron removal from He in slow collisions with Xe ions of high charge (q≤31).Keywords
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