Investigation of the doubly excited [formula omitted] resonance series in C[formula omitted] ion

Abstract

We investigate in the present paper the doubly excited 1Po states in the C4+ ion. We report highly accurate results of their energy positions in the energy spectrum, their lifetimes and the x-ray photon energies required to populate them and observe their autoionization. The results were obtained by using our B-spline based spectral approach combined with the complex rotation method that has proven its effectiveness in the detection of the doubly excited states in the O6+[1] and Li+[2] ions. We also report in the paper the first results on the characterization and identification of the states that share similar angular correlation pattern, which allows their classification into distinct resonance series.