Here is the electron-impact ionization cross section for Ammonia (NH₃) 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)

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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).
	N. Djuric, D. Belic, M. Kurepa, J. U. Mack, J. Rothleitner and T. D. Märk, Abstracts, 12th Int. Conf. on the Physics of Atomic and Electronic Collisions, ed. by S. Datz (Gatlinburg, 1981), p. 384.
	M. V. V. S. Rao and S. K. Srivastava, J. Phys. B 25, 2175 (1992).

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