Measured cross sections for single ionization of Cu2+ by electron impact. Uncertainties are one standard deviation relative only. Total uncertainty for a typical point near the peak cross section is ±8% at 90% confidence level. Reference: D. C. Gregory and A. M. Howald, Phys. Rev. A 34, 97 (1986).

             Energy         Cross Section
              (eV)           (10-18 cm2)
               25.8          0.38 ± 0.29
               27.8          0.42 ± 0.34

                           Low             High
                        Metastable       Metastable
                         Content          Content

               30.8     0.51 ± 0.89      2.80 ± 0.24
               35.8     4.32 ± 1.00      9.77 ± 0.47
               40.7     9.31 ± 1.07     13.54 ± 0.37
               45.7    14.0  ± 1.5      20.3  ± 0.6
               50.5    19.2  ± 1.0      23.6  ± 0.4
               55.4    22.3  ± 0.9      24.8  ± 0.5

               60.4         27.7  ± 0.4
               65.4         29.3  ± 0.4
               70.3         31.5  ± 0.4
               75.1         33.7  ± 0.4
               80.1         35.5  ± 0.4
               85.1         36.9  ± 0.5
               89.9         37.1  ± 0.4
               95.1         38.1  ± 0.2
              100           39.2  ± 0.3
              110           40.1  ± 0.4
              120           41.9  ± 0.3
              144           43.9  ± 0.6
              169           45.4  ± 0.5
              194           46.5  ± 0.4
              218           45.1  ± 0.4
              243           43.4  ± 0.4
              267           48.8  ± 0.3
              292           43.7  ± 0.2
              339           42.4  ± 0.3
              390           39.9  ± 0.2
              439           37.0  ± 0.2
              489           35.4  ± 0.2
              588           33.5  ± 0.1
              687           31.7  ± 0.3
              835           29.1  ± 0.1
              986           26.1  ± 0.1
             1233           23.6  ± 0.2
             1480           22.1  ± 0.1

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Last Modified: Friday, January 10, 1997