Abstract
The technique of collision-induced non-radiative transitions has been used to study the excitation transfer in neon brought about by electron-atom collision processes. The experimental results are in agreement with the selection rules suggested by a theoretical analysis for excitation transfer by this process. These selection rules are: (i) the core configuration is conserved and (ii) N+N'>or approximately=K>or approximately= mod N-N' mod , where N=l, j, J. Here, l and j, respectively, refer to the orbital and total angular momentum quantum numbers of the running electron and J is the total angular momentum quantum number for the atom. N' refers to the similar quantum numbers for the final state involved in the excitation transfer and K=1 for dipolar interactions and 2 for quadrupole interactions. The electron-atom collision process seems to be a more efficient mechanism of excitation transfer than atom-atom collision processes.
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