Electron loss cross sections for O-, O-2, NO-2, and NO-3 in several gases

The cross sections for electron loss for O−, O−2, NO−2, and NO−3 on He, N2, and Ar, for O− on O2, and NO−3 on NO2 have been measured using a beam attenuation technique. The measured cross sections are the sum of collisional detachment and electron transfer cross sections. Except for O− + O2, the cross sections are nearly constant for ion energies in the range 1 to 4 keV and generally increase with target mass.