Measurements of cross sections for the ionization of Li+ and Ba+ ions by electron impact
- 1 September 1968
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 1 (5) , 872-878
- https://doi.org/10.1088/0022-3700/1/5/315
Abstract
Cross sections have been measured for the reaction Li+ +e -> Li2+ +2e for electron energies between threshold and 3 keV. The cross section reaches a maximum value 4.15 × 10-18 cm2 ± 6% at an electron energy of 325 eV. At higher energies the results are similar to those of Rapp and Englander-Golden for helium when the latter measurements are scaled classically. The reaction Ba+ +e -> Ba2+ +2e has been investigated for electron energies between threshold and 2 keV. At an electron energy of 18 eV the cross section increases abruptly from 1.6 × 10-16 cm2 to 4.25 × 10-16 cm2. This is interpreted as the onset of autoionization (inner-shell excitation).Keywords
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