R. Gayet et al., DOUBLE-ELECTRON CAPTURE BY FAST BARE IONS IN HELIUM-ATOMS - PRODUCTION OF SINGLY AND DOUBLY-EXCITED STATES, Physica scripta. T, 53(5), 1996, pp. 549-556
Double electron capture by fast bare ions in helium is studied in the
framework of the Four-Body Continuum Distorted Wave theory. It is show
n that experimental data is well reproduced when the theoretical total
cross-section include both contributions from the ground state and fr
om the first singly excited states. In addition, cross-sections for th
e production of the first doubly excited states are also calculated. P
resent results call for additional experimental data at higher impact
energies than presently available.