A study of ionization in rubidium has been made in a crossed atom-electron beam apparatus. At an electron energy of about 10 eV there is a maximum in the cross section corresponding to the maximum probability for removal of the 5s valence electron. At 16.5 eV we have observed a new peak that is caused by the mechanism of autoionization. For energies below 30 eV there is a good agreement, both in shape and magnitude, between the present measurements and the empirical formula of Lotz. The over-all uncertainty in the measurements is ± 12% which is mostly accounted for by the uncertainty in the determination of the rubidium number density. 1 Present address: Department of Physics, University of Windsor, Windsor, Ont., Canada.
K. J. Nygaard and Y. B. Hahn, "Total Electron Impact Ionization Cross Section In Rubidium From Threshold To 250 EV," The Journal of Chemical Physics, pp. 3493 - 3499, American Institute of Physics, Jan 1973.
The definitive version is available at https://doi.org/10.1063/1.1679681
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01 Jan 1973