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Inter-Series Interactions on the Atomic Photoionization Spectra Studied by the Phase-Shifted Multichannel-Quantum Defect Theory

Department of Chemistry, Ajou University, Suwon 16499, Korea
Academic Editor: Elmar Träbert
Atoms 2017, 5(2), 21; https://doi.org/10.3390/atoms5020021
Received: 31 January 2017 / Revised: 11 May 2017 / Accepted: 12 May 2017 / Published: 20 May 2017
(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)
Development in mathematical formulations of parameterizing the resonance structures using the phase-shifted multichannel quantum defect theory (MQDT) and their use in analyzing the effect of inter-series interactions on the autoionizing Rydberg spectra is reviewed. Reformulation of the short-range scattering matrix into the form analogous to S = SBSR in scattering theory are the crucial step in this development. Formulation adopts different directions and goals depending on whether autoionizing series converge to the same limit (degenerate) or to different limits (nondegenerate) because of the different nature of the perturbation. For the nondegenerate case, finding the simplest form of profile index functions of the autoionizing spectra with the minimal number of parameters is the main goal and some results are reviewed. For the degenerate case where perturbation acts uniformly throughout the entire series, isolation of the overlapped autoionizing series into the unperturbed autoionizing series is the key objective in research and some results in that direction are reviewed. View Full-Text
Keywords: phase-shifted multichannel quantum defect theory (MQDT); inter-series interactions; atomic autoionizing spectra phase-shifted multichannel quantum defect theory (MQDT); inter-series interactions; atomic autoionizing spectra
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Lee, C.-W. Inter-Series Interactions on the Atomic Photoionization Spectra Studied by the Phase-Shifted Multichannel-Quantum Defect Theory. Atoms 2017, 5, 21.

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