Measurements of electron impact ionization cross sections of Mg2+ ions and a note on the classical scaling law
- 1 November 1969
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 2 (11), 1176-1179
- https://doi.org/10.1088/0022-3700/2/11/307
Abstract
A crossed-beam method has been used to study the reaction Mg2+ +e -> Mg3+ +2e for electron energies which ranged from threshold (78 ev) to 3 kev. The cross section attained a maximum value of 138 × 10-17 cm2 at 300 ev. The results are compared with partial cross sections (for single ionization) of neon and Na+, which are the two lower members of the neon sequence. The scaling law for isoelectronic ions, which follows from Thomson's classical theory, is seen to become more accurate with increasing ionic charge for this sequence.Keywords
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