  22
  1.2060000e+001  0. 
  1.3000000e+001  2.3000000e-022
  1.8000000e+001  2.0000000e-021
  2.8000000e+001  7.4000000e-021
  3.8000000e+001  1.3200000e-020
  4.8000000e+001  1.8000000e-020
  5.8000000e+001  2.1000000e-020
  6.8000000e+001  2.3300000e-020
  7.8000000e+001  2.5000000e-020
  8.8000000e+001  2.6000000e-020
  1.0000000e+002  2.7000000e-020
  1.5000000e+002  2.7000000e-020
  2.0000000e+002  2.5000000e-020
  3.0000000e+002  2.1700000e-020
  5.0000000e+002  1.6600000e-020
  7.0000000e+002  1.3500000e-020
  1.0000000e+003  1.0400000e-020
  1.5000000e+003  7.6000000e-021
  2.0000000e+003  6.0000000e-021
  3.0000000e+003  4.2000000e-021
  5.0000000e+003  2.7000000e-021
  7.0000000e+003  2.0000000e-021
  1.0000000e+004  1.4000000e-021

// eV (in a system with O2 at rest)  sigma m2
// e + O_2 -> 2e + O_2_+  (ionization)
// Ionization energy = 12.06 eV

// From A.V. Phelps, JILA Information center Report N 28, University of Colorado, Boulder, CO (1985)
// From ftp://jila.colorado.edu/collision_data/electronneutral/electron.txt
