309292.fig.002a
(a)
309292.fig.002b
(b)
309292.fig.002c
(c)
309292.fig.002d
(d)
Figure 2: (a) The double differential cross sections (in the units of ) as a function of angle at ( and ) corresponding to the production of various cations from electron impact ionization of . (b) Same as (a) but at ( and ). (c) Same as (a) but at ( = 10 eV and ). (d) Same as (a) but at ( and ).