Differential cross sections for Li(2p) excitation in Li-inert-gas collisions from photon-scattered-atom coincidence measurements
- 14 September 1980
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 13 (17) , 3389-3399
- https://doi.org/10.1088/0022-3700/13/17/018
Abstract
Differential cross sections for Li(2p) excitation in low-energy (1000 eV) Li-inert-gas collisions have been determined from photon-scattered-atom coincidence measurements; reduced angles tau up to 18 keV deg were studied. The following conclusions are drawn from the data and are illustrated by model calculations with the coupled-state impact parameter method: for Li-Ne, Ar, Kr, and Xe the excitation process is due to non-adiabatic transitions at internuclear distances where the two closed shells of Li+ and the inert-gas atom overlap (1.1, 1.6, 1.76 and 2.2 au respectively); for Li-He, Li(2p) excitation is mainly due to direct, non-localised transitions between the molecular states formed from Li(2s) and Li(2p)-He at distances as large as 2 au.Keywords
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