Here is the electron-impact ionization cross section for Methane (CH₄) 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)

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Data set	Source
	BEB (vertical IP) Y.-K. Kim, W. Hwang, N. M. Weinberger, M. A. Ali and M.E. Rudd, J. Chem. Phys. 106, 1026 (1997).
	BEB (adiabatic IP) W. Hwang, Y.-K. Kim and M.E. Rudd, J. Chem. Phys. 104, 2956 (1996).
	D. Rapp and P. Englander-Golden, J. Chem. Phys. 43, 1464 (1965).
	O. J. Orient and S. K. Srivastava, J. Phys. B 20, 3923 (1987).
	N. Duric, I. Cadez and M. Kurepa, Int. J. Mass Spectrom. Ion Processes 108, R1 (1991).
	B. L. Schram, M. J. van der Wiel, F. J. de Heer and H. R. Moustafa, J. Chem. Phys. 44, 49 (1966).

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