Absolute cross sections for electron-impact single ionization of B2+. The uncertainties listed are one standard deviation relative. Within the range marked structure scans the counting statistics are assumed to be the only significant relative variation; relative variations due to form factors and detection sensitivity are neglected in this range. Total absolute uncertainty is ±8% at high confidence corresponding to 90% confidence level for the statistical uncertainties. Reference: D. H. Crandall et al. , Phys. Rev. A 34, 1757 (1986).


       Energy       Cross section
        (eV)        (10-18 cm2)
          25.8     -0.37  ± 0.33
          30.8      0.02  ± 0.30
          35.7      0.03  ± 0.29
          40.6      1.70  ± 0.29
          45.5      3.08  ± 0.30
          50.4      4.07  ± 0.29
          55.3      5.22  ± 0.29
          60.2      5.38  ± 0.29
          65.2      5.94  ± 0.29
          70.1      6.62  ± 0.29
          80.0      6.89  ± 0.28
          86.8      7.49  ± 0.35
          95.0      7.42  ± 0.26
         104.6      7.40  ± 0.32
         114.5      7.87  ± 0.33
         124.3      7.47  ± 0.30
         134.2      7.25  ± 0.29
   ___   144.0      7.37  ± 0.22
         153.6      7.33   (0.14)
    S    163.4      7.22   (0.13)
    T    168.6      7.22   (0.15)
    R    173.2      7.05   (0.09)
    U    178.1      7.10   (0.11)
    C    183.0      7.08   (0.11)
    T    187.9      7.01   (0.10)
    U    193.2      6.91   (0.06)
    R    195.0      6.96   (0.08)
    E    196.7      7.19   (0.08)
         198.5      7.23   (0.06)
    S    201.0      7.09   (0.08)
    C    203.0      7.16   (0.06)
    A    204.8      7.08   (0.08)
    N    212.9      6.90   (0.10)
    S    222.7      6.79   (0.09)
   ___   232.5      6.83   (0.09)
         251        6.54  ± 0.25
         291        6.35  ± 0.22
         388        5.56  ± 0.18
         488        5.05  ± 0.16
         685        4.76  ± 0.17
         883        4.25  ± 0.15
         1181       3.29  ± 0.13
         1473       3.01  ± 0.10

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Last Modified: Friday, January 10, 1997