1. Resonance-induced deviations of β from 2.0 for rare gas s-subshell photoionization
- Author
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Scott B. Whitfield, Steven T. Manson, T. Banerjee, Hari R. Varma, Ralf Wehlitz, and Pranawa C. Deshmukh
- Subjects
Physics ,Rare gas ,Phase (waves) ,Inert gases ,Resonance ,Angle measurement ,Photoionization ,Angular distribution anisotropy ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Quantum defects ,Quantum defect ,Resonance induced deviations ,Angular distribution ,Degree of variation ,Quantum theory ,Anisotropy ,Atomic physics ,Excitation - Abstract
We investigate the case of resonance-induced deviations of the angular distribution anisotropy parameter, ?, from its nominal value of 2.0 for the Kr 4s-subshell at the 3d ? mp(m ? 5) excitations and the Xe 5s-subshell in the region of the 4d ? mp(m ? 6) excitations. We observe small but unmistakable variations of ? from 2.0 at these resonances. In the case of Kr the largest deviation from 2.0 is a mere -0.030(6), ? 4s ? 1.970(6), while in Xe it is definitively larger at -0.080(6), ? 5s ? 1.920(6). To understand these results in more detail, we have carried out relativistic random phase and relativistic multi-channel quantum defect calculations. Our theoretical results clearly indicate deviations of ? from 2.0 for these photolines in these resonance regions, although the degree of variation is predicted to be larger than what is observed. � 2006 IOP Publishing Ltd.
- Published
- 2006
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