Electron-impact ionization cross sections for S4+. Uncertainties are one standard deviation on counting statistics. Total uncertainties are ±9% at 90% confidence level for a typical point near the peak cross section. Reference: A. M. Howald et al., Phys. Rev. A 33, 3779 (1986).

              Energy        Cross Section
               (eV)          (10-18 cm2)
               37.3          0.12 ± 0.17
               47.2          0.25 ± 0.14
               57.1          0.20 ± 0.11
               61.2          0.18 ± 0.14
               64.2          0.28 ± 0.15
               67.0          0.56 ± 0.16
               69.9          0.80 ± 0.15
               72.0          1.14 ± 0.18
               74.0          1.23 ± 0.12
               76.8          1.37 ± 0.11
               79.0          1.84 ± 0.16
               81.9          2.19 ± 0.17
               83.1          2.03 ± 0.15
               86.9          2.46 ± 0.11
               91.7          2.92 ± 0.15
              102.4          3.59 ± 0.13
              112.3          3.75 ± 0.13
              122.9          4.48 ± 0.13
              127            4.48 ± 0.13
              127            4.33 ± 0.13
              137            4.47 ± 0.13
              142            4.35 ± 0.10
              147            4.93 ± 0.12
              152            4.75 ± 0.10
              157            4.66 ± 0.13
              162            4.83 ± 0.13
              167            4.95 ± 0.13
              171            5.31 ± 0.13
              177            5.44 ± 0.13
              181            5.92 ± 0.13
              186            6.17 ± 0.14
              191            6.27 ± 0.08
              194            6.24 ± 0.07
              198            6.74 ± 0.07
              200            6.57 ± 0.14
              203            6.62 ± 0.14
              206            6.75 ± 0.14
              209            6.73 ± 0.14
              216            6.98 ± 0.09
              236            7.21 ± 0.09
              256            7.30 ± 0.09
              265            7.10 ± 0.09
              275            6.89 ± 0.07
              285            6.93 ± 0.09
              292            6.94 ± 0.07
              317            6.74 ± 0.09
              341            6.57 ± 0.09
              367            6.44 ± 0.09
              391            6.31 ± 0.09
              440            6.26 ± 0.09
              490            6.29 ± 0.07
              539            6.16 ± 0.18
              589            5.76 ± 0.09
              638            5.72 ± 0.09
              689            5.56 ± 0.06
              839            4.97 ± 0.07
              992            4.40 ± 0.07
             1195            3.97 ± 0.07
             1392            3.68 ± 0.07

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Last Modified: Friday, January 10, 1997