Reference: Electron-impact ionization of atomic ions for ADAS, Pindzola, Griffin, Badnell, and Summers, Atomic and Plasma-Material Interaction Data for Fusion (Supplement to the journal Nuclear Fusion) Volume 6, 117 (1995)
e + N
e + N+
e + N2+
e + N3+
e + N4+
e + N5+