Measured cross sections for single ionization of Hf3+ by electron impact. Uncertainties are one standard deviation counting statistics only and taken as representative of relative uncertainties. Total uncertainty for a typical point near the peak cross section is ±8% at 90% confidence level. Reference: R. A. Falk et al., Phys. Rev. A 27, 762 (1983).

             Energy         Cross Section
              (eV)           (10-18 cm2)
               33.3          7.3  ± 1.9
               34.2         11.6  ± 2.0
               35.3         22.2  ± 2.3
               35.7         21.0  ± 1.3
               36.2         23.2  ± 1.4
               36.7         30.1  ± 1.3
               37.2         33.6  ± 1.2
               38.2         46.7  ± 1.2
               39.2         60.6  ± 4.1
               39.6         58.9  ± 1.3
               40.1         63.6  ± 1.2
               40.6         67.1  ± 1.8
               41.2         72.5  ± 2.0
               42.1         80.0  ± 1.9
               43.1         85.5  ± 3.0
               44.1         90.3  ± 2.5
               45.1         90.1  ± 2.3
               46.1         94.0  ± 2.2
               47.1         94.8  ± 2.1
               48.0         89.7  ± 2.2
               49.0         92.8  ± 2.7
               50.1         94.8  ± 1.8
               51.1         93.5  ± 1.8
               52.0         96.4  ± 2.3
               53.0        101.3  ± 2.2
               54.0        104.0  ± 2.7
               55.0        104.6  ± 3.1
               56.0        101.5  ± 3.7
               57.0        103.2  ± 1.9
               58.0        103.4  ± 2.1
               58.9        109.2  ± 3.1
               59.9        109.9  ± 2.1
               61.0        110.2  ± 2.0
               61.9        114.7  ± 1.9
               62.9        112.1  ± 2.4
               66.2        113.1  ± 3.3
               70.8        118.0  ± 1.9
               75.7        120.7  ± 1.8
               80.7        116.6  ± 2.8
               96.1        122.9  ± 1.2
              115.1        121.4  ± 2.6
              120.0        122.3  ± 1.8
              146.9        119.2  ± 1.1
              169.9        114.5  ± 0.8
              194.0        113.4  ± 0.8
              243.9        101.2  ± 1.0
              293.0        100.1  ± 0.4
              392.6         90.5  ± 0.7
              491           85.1  ± 0.4
              592           76.6  ± 0.8
              690           70.8  ± 0.3
              839           64.9  ± 0.3
              988           60.6  ± 0.5

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Last Modified: Friday, January 10, 1997