Here is the electron-impact ionization cross section for Water (H₂O) 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 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).
	N. Lj. Duric, I. M. Cadez, and M. V. Kurepa, Int. J. Mass. Spectrom. Ion Processes 83, R7 (1988).
	J. Schutten, F. J. de Heer, H. R. Moustafa, A. J. H. Boerboom and J. Kistenmaker, J. Chem. Phys. 44, 3924 (1966).
	M. A. Bolorizadeh and M. E. Rudd, Phys. Rev. A 33, 882 (1985).
	M. V. V. S. Rao, I. Iga and S. K. Srivastava, J. Geophys. Res. 100, 26421 (1995).
	S. P. Khare and W. J. Meath, J. Phys. B 20, 2101 (1987), and references therein (theory).
	H. C. Straub, B. G. Lindsay, K. A. Smith, and R. F. Stebbings, J. Chem. Phys. 108, 109 (1998).

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