Here is the electron-impact ionization cross section for Hydrogen molecule ion (H2+) from 5 eV to 1000 eV.

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T=5 to 1000 eV T=5 to 100 eV T=50 to 250 eV T=250 to 1000 eV

Legend (below)

Data setSource
Y.-K. Kim, K. K. Irikura, and M. A. Ali, J. Res. NIST 105, 285 (2000).
Experiment #1B. Peart and K. T. Dolder, J. Phys. B 6, 2409 (1973).

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