The effect of the spin-orbit interaction on non-dipole processes in atomic photoionization from s-shells is examined. New formulae are derived for the parameters γ and δ that describe the forward-backward asymmetry of the photoelectron angular distribution. It is found that S may be non-zero, unlike in the non-relativistic central-field model. The reactions ns → eℓ and ns2 → nseℓ are considered separately and it is shown that the latter case may be economically given in terms of singlet and triplet continuum state amplitudes. The spin-orbit interaction in intermediate autoionizing states introduces a strong energy dependence into the non-dipole parameters and this may be used to determine relative phases of the continua. It is suggested that Xe 4d-1nℓ odd and even parity autoionizing levels are a possible system for experimental investigation.
|Number of pages||16|
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|State||Published - Oct 28 2004|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics