The fine-structure effect for N3L states in LS-coupled targets
- 28 February 1988
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 21 (4) , L107-L112
- https://doi.org/10.1088/0953-4075/21/4/007
Abstract
The fine-structure effect associated with electron impact excitation of LS-coupled atomic targets from the 1S ground state to a N3L final state is discussed. The relationship between the electron impact coherence parameters (EICP) and the fine-structure effect spin-polarisation function is illustrated for the case of excitation of the N3DJ (J=1, 2, 3; N=3, 4,. . . 8) states of helium. It is shown that for L>or=3 (i.e., N3F, N3G, etc.) excitation processes, the electron spin-polarisation experiments provide different information from that obtained from electron-photon coincidence experiments. If data from spin-polarisation and EICP experiments can be combined, information about the octupole moment of the electron impact induced final atomic state can be obtained.Keywords
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