Overlapping resonances in the β-parameter spectrum

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Symmetry reversals and fluctuations of both width and intensity have so far been regarded photoabsorption spectroscopy. It is demonstrated for the first time that they can also appear in the β-parameter spectrum, which then becomes generally different in appearance from the corresponding photoionization spectrum. Indeed, not only the location of the symmetry reversals, but even their number within a series differ between both spectra, and intensity fluctuations present in one spectrum can be absent from the other. Our study is performed within the `spin-polarized' random-phase approximation with exchange.

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Journal of Physics B: Atomic, Molecular and Optical Physics

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