Here is the electron-impact ionization cross section for Hydrogen molecule (H2) from 5 eV to 2000 eV.

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T=5 to 2000 eV T=5 to 100 eV T=50 to 250 eV T=250 to 2000 eV

Legend (below)

Data setSource
Y.-K. Kim and M.E. Rudd, Phys. Rev. A 50, 3954 (1994); W. Hwang, Y.-K. Kim and M.E. Rudd, J. Chem. Phys. 104, 2956 (1996); and Y.-K. Kim and M. E. Rudd, Comments At. Mol. Phys. 34, 293 (1999).
Theory #1D. R. Schultz, L. Meng and R. E. Olson, J. Phys. B 25, 4601 (1992).
Theory #2M. Gryzinski, Phys. Rev. 138, A305 (1965); 138, A322 (1965); 138, A336 (1965).
Experiment #1D. Rapp and P. Englander-Golden, J. Chem. Phys. 43, 1464 (1965).
Experiment #2E. Krishnakumar and S. K. Srivastava, J. Phys. B 27, L251 (1994).
Experiment #3B. L. Schram, F. J. de Heer, M. J. van der Wiel and J. Kistenmaker, Physica 31, 94 (1965).
Experiment #4B. L. Schram, H. R. Moustafa, J. Schutten and F. J. de Heer, Physica 32, 734 (1966).
Experiment #5H. C. Straub, P. Renault, B. G. Lindsay, K. A. Smith, and R. F. Stebbings, Phys. Rev. A 54, 2146 (1996).

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