Strong interference effects in thee−+Sc3+recombination cross section

Abstract

The ${e}^{\ensuremath{-}}+{\mathrm{Sc}}^{3+}$ recombination cross section exhibits a strong interference between the radiative and dielectronic recombination pathways at low energies. The resonances associated with the ${3p}^{5}{3d}^{22}F$ term in Sc${}^{2+}$ are found to have unusually large autoionization widths. Their strong interference with the background radiative recombination results in quite distinct asymmetric resonance profiles. Current ion storage ring experiments should be able to verify the strength of the interference effects.