Measured cross sections for single ionization of Ar2+ by electron impact. Uncertainties are one standard deviation from counting statistics and are taken as representative of relative uncertainties. Total uncertainty for a typical point near the peak cross section is ±8% at 90% confidence level. Reference: D. W. Mueller et al., Phys. Rev. A 31, 2905 (1985).

             Energy         Cross Section
              (eV)           (10-18 cm2)
               15.9          0.32 ± 0.19
               20.8          0.86 ± 0.21
               25.7          2.17 ± 0.21
               30.8          3.65 ± 0.18
               35.7          4.30 ± 0.18
               40.7          8.34 ± 0.19
               45.5         24.52 ± 0.21
               50.5         34.49 ± 0.18
               55.3         39.59 ± 0.18
               65.3         44.47 ± 0.18
               75.1         48.50 ± 0.18
               85.0         49.46 ± 0.18
               95.0         46.62 ± 0.09
              109.3         48.82 ± 0.13
              129.3         48.29 ± 0.12
              144.3         43.94 ± 0.11
              193.3         40.12 ± 0.11
              290.5         34.58 ± 0.05
              388           28.55 ± 0.11
              489           23.67 ± 0.11
              687           19.95 ± 0.06
              836           18.04 ± 0.05
              985           15.81 ± 0.04

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Last Modified: Friday, January 10, 1997