  In interatomic Coulombic electron capture, the capture of a free electron at
an atomic center is accompanied by the radiationless transfer of the excess
energy to a neighboring atom of different species, leading to ionization of the
latter. We show that this interatomic process can be strongly enhanced by the
presence of an additional third atom, provided the energy of the free-bound
capture transition in the first atom is resonant to a dipole-allowed excitation
energy in this assisting atom. The relation of the resonantly enhanced
three-center electron capture with other processes is discussed, and its
dependencies on the incident electron energy and the spatial geometry of the
triatomic system are illustrated.
