Abstract
Electron capture and target excitation in Beq+ (q = 2–4) and Bq+ (q = 2–3) + H and He collisions are studied theoretically by using a semiclassical molecular representation with six to 22 molecular channels at collision energies above 50 eV/u and by using a fully quantum mechanical molecular representation with three to five channels below 50 eV/u. The ab initio potential curves and nonadiabatic coupling matrix elements for the HeBeq+ and HeBq+ systems are obtained from either a pseudopotential-modified configuration interaction method or multireference single- and double-excitation configuration interaction (MRD-CI) calculations. Cross sections for electron capture are summarized in numerical tables. Target-excitation processes are also examined for some systems and significant effects of these channels on capture channels are discussed.
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