e + O
e + O+
e + O2+
e + O3+
e + O4+
e + O5+
e + O6+
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 + O
e + O+
e + O2+
e + O3+
e + O4+
e + O5+
e + O6+