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Table 3

Measured absolute cross sections of SEC and DEC processes for C4++O2, N2, and CH4(IP=12.1 eV, 15.6 eV, and 12.6 eV, respectively).

Energy O2 N2 CH4
σq, q–1 σq, q–2 σq, q–1 σq, q–2 σq, q–1 σq, q–2
2.33 27.29 ± 2.43 10.93 ± 1.02 27.15 ± 2.36 8.96 ± 0.82 35.27 ± 3.10 9.48 ± 0.90
3.67 22.49 ± 2.00 9.95 ± 0.93 26.07 ± 2.27 9.29 ± 0.85 34.67 ± 3.05 9.59 ± 0.91
5.00 20.54 ± 1.83 9.78 ± 0.91 24.82 ± 2.16 9.32 ± 0.86 31.97 ± 2.81 9.43 ± 0.90
6.67 20.92 ± 1.86 9.90 ± 0.92 23.05 ± 2.01 8.85 ± 0.81 31.13 ± 2.74 9.60 ± 0.91
8.67 19.39 ± 1.73 9.18 ± 0.85 22.83 ± 1.99 8.67 ± 0.80 29.93 ± 2.63 9.12 ± 0.87
10.67 15.69 ± 1.40 9.13 ± 0.85 18.65 ± 1.62 8.80 ± 0.81 24.16 ± 2.13 8.91 ± 0.85
13.33 15.70 ± 1.40 7.99 ± 0.74 16.31 ± 1.42 8.40 ± 0.77 23.30 ± 2.05 8.33 ± 0.79
16.67 14.93 ± 1.33 8.63 ± 0.80 17.73 ± 1.54 8.81 ± 0.81 24.69 ± 2.17 9.04 ± 0.86
20.00 12.19 ± 1.08 7.98 ± 0.74 14.71 ± 1.28 8.83 ± 0.81 20.76 ± 1.83 8.68 ± 0.82
24.00 10.54 ± 0.94 8.45 ± 0.79 13.49 ± 1.17 8.44 ± 0.78 19.98 ± 1.76 8.63 ± 0.82
28.33 12.23 ± 1.09 8.56 ± 0.80 14.69 ± 1.28 8.26 ± 0.76 21.62 ± 1.90 9.52 ± 0.90
33.33 11.77 ± 1.05 7.78 ± 0.72 12.69 ± 1.10 7.69 ± 0.71 23.11 ± 2.03 8.14 ± 0.77

Notes. The units of all cross sections are 10−16 cm2, and energies in keV/u.

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