Study of inner-shell excitation and relaxation processes in atomic and ionic Ne by means of soft x-ray spectroscopy

摘要

By using soft x-ray spectroscopy, we investigate the inner-shell excitation and relax-ation processes in atomic and ionic Ne targets. Resonant x-ray emission spectroscopy was applied to neutral Ne atom in the regions of the [ls]np (n = 3, 4, ·· , θ) excited states and [1s2p]3pmp (m = 3, 4) doubly excited states to obtain the spectroscopic information on the [2p]np and [2p~2]3pmp final electronic states, where square brackets indicate hole states. The energy levels of the [2p~2]3pmp (m = 3, 4) electronic states were spectroscopically measured for the first time. As for the ionic Ne target, on the other hand, the photoion yield spectroscopy was adopted to survey the is np (n = 2, 3) resonant excitation and subsequent Auger decay processes for Ne+ target-ions. The observed Ne~(2+) photoion yield spectrum is successfully explained by the theoretical calculations based on the multiconfiguration Dirac-Fock method.