Excitation of a singly charged indium ion by electron impact

Inelastic collisions of slow electrons with indium atoms resulting in the production of excited singly charged indium ions are experimentally studied. Excitation cross sections of 123 InII spectral lines are measured at the excitation electron energy of 30 eV. Nine optical excitation functions are recorded. The dependence of the excitation cross sections on the principal quantum number of the upper level is examined for 12 InII spectral series.