Impact-parameter dependence of K-shell excitation in slow ion-atom collisions
- 28 June 1979
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 12 (12) , 1973-1993
- https://doi.org/10.1088/0022-3700/12/12/016
Abstract
Beams of N, O, Ne, Na and Mg ions with an energy of a few hundred keV were injected into gaseous N2, O2, H2O and Ne targets under single-collision conditions. The experiment allowed simultaneous measurement of X-rays and Auger electrons in coincidence with ions scattered through angles from 0.9 to 40 degrees in the laboratory frame. The impact-parameter dependence of K excitation was found to show characteristic deviations from the predictions of the 2p sigma -2p pi rotational coupling theory. In the Ne-O collision system, the O K fluorescence yield exhibits a pronounced impact-parameter dependence. The dependence of the total fluorescence yield omega K on ion energy and charge state has been measured.Keywords
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