Absolute emission cross sections for the excitation atomic and ionic lines of nitrogen are measured in the VUV region of 50 to 130 nm in the He+ projectile energy range 1-10 keV. Excitation of the intense lines are caused by formation of core-excited intermediate molecular states of N2+* in the charge exchange processes. In particular the most intense line N I (120.0 nm) can be excited by formation of a 2s sigma g hole in the ground state of the N2 molecule. This intermediate one-hole molecular state of N+2 can be formed by configuration interaction with 2 Sigma +g core-excited molecular Rydberg states.
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