Measured cross sections for single ionization of Fe2+ 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)
               15.4          0.67 ± 0.65
               16.1         -1.23 ± 0.62
               17.2          0.52 ± 0.60
               19.0          0.56 ± 0.62
               20.8          0.26 ± 0.56
               21.9          1.70 ± 0.63
               22.7         -0.12 ± 0.50
               24.8          1.08 ± 0.48
               26.0          2.22 ± 0.65
               28.0          5.84 ± 0.68
               29.8          8.20 ± 0.70
               31.1          8.45 ± 0.78
               31.9         11.04 ± 0.69
               34.0         16.66 ± 0.72
               36.1         21.79 ± 0.76
               38.5         21.20 ± 0.77
               40.5         23.13 ± 0.71
               41.0         23.23 ± 0.70
               42.2         24.12 ± 0.78
               44.3         26.79 ± 0.68
               45.7         29.62 ± 0.53
               46.3         28.35 ± 0.39
               48.3         31.01 ± 0.49
               50.7         34.07 ± 0.49
               52.2         36.05 ± 0.72
               54.1         37.82 ± 0.72
               55.8         41.10 ± 0.73
               56.2         39.72 ± 0.71
               58.2         43.55 ± 0.78
               60.5         44.49 ± 0.53
               62.2         46.60 ± 0.76
               64.1         48.69 ± 0.82
               65.9         48.81 ± 0.56
               68.2         51.22 ± 0.84
               70.5         51.83 ± 0.54
               72.2         53.70 ± 0.86
               75.6         54.11 ± 0.71
               80.6         56.19 ± 0.74
               85.5         56.25 ± 0.75
               90.4         57.41 ± 0.74
               95.3         58.93 ± 0.43
              100.6         59.46 ± 0.73
              115           62.60 ± 0.86
              134           64.16 ± 0.84
              144           65.29 ± 0.87
              154           63.85 ± 0.73
              174           63.90 ± 0.77
              193           62.60 ± 0.75
              242           62.24 ± 0.72
              291.7         59.40 ± 0.39
              390           50.22 ± 0.52
              489           46.04 ± 0.51
              687           40.72 ± 0.45
              886           36.51 ± 0.29
             1186           31.60 ± 0.26
             1486           28.04 ± 0.32

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Last Modified: Friday, January 10, 1997