309292.fig.003a
(a)
309292.fig.003b
(b)
309292.fig.003c
(c)
309292.fig.003d
(d)
Figure 3: (a) The double differential cross sections (in the units of ) as a function of energy loss at ( and ) for the production of cations from electron impact ionization of . (b) Same as (a) but at ( and ). (c) Same as (a) but at ( and ). (d) Same as (a) but at ( and ).