Experimental electron-impact single-ionization cross sections for Si4+. Relative uncertainties listed are two standard deviations. The absolute uncertainties at a 90% confidence level are listed in parentheses. Reference: J. S. Thompson and D. C. Gregory, Phys. Rev. A 50, 1377 (1994).

             Energy               Cross Section
              (eV)                (10-18 cm2)
              33.4            -0.002 ± 0.044 (0.044)
              46.5             0.043 ± 0.028 (0.028)
              48.4             0.034 ± 0.040 (0.040)
              60.8             0.043 ± 0.036 (0.036)
              72.4             0.151 ± 0.030 (0.032)
              84.6             0.240 ± 0.026 (0.031)
              96.0             0.276 ± 0.026 (0.032)
              97.4             0.282 ± 0.028 (0.034)
             121               0.474 ± 0.028 (0.044)
             146               0.681 ± 0.032 (0.057)
             169               0.847 ± 0.030 (0.067)
             181               1.344 ± 0.022 (0.098)
             194               1.892 ± 0.022 (0.136)
             206               2.289 ± 0.024 (0.163)
             218               2.634 ± 0.034 (0.190)
             242               3.242 ± 0.028 (0.231)
             266               3.718 ± 0.028 (0.264)
             290               4.043 ± 0.024 (0.287)
             337               4.491 ± 0.026 (0.319)
             385               4.620 ± 0.160 (0.360)
             434               4.929 ± 0.042 (0.351)
             483               5.081 ± 0.034 (0.361)
             532               5.270 ± 0.050 (0.376)
             581               5.349 ± 0.102 (0.392)
             639               5.316 ± 0.016 (0.376)
             688               5.07  ± 0.30 (0.47)
             738               5.01  ± 0.04 (0.36)
             788               4.82  ± 0.06 (0.35)
             836               4.78  ± 0.04 (0.34)
             886               4.77  ± 0.02 (0.34)
             936               4.68  ± 0.04 (0.33)
             986               4.85  ± 0.16 (0.38)
            1085               4.62  ± 0.04 (0.33)
            1181               4.52  ± 0.10 (0.33)
            1330               4.62  ± 0.20 (0.38)
            1487               4.14  ± 0.14 (0.32)

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Last Modified: Friday, January 10, 1997