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Analytical Property of Scattering Matrix:Spectroscopy Phenomena and Sharp Overlapping Autoionization Resonances. | LitMetric

Analytical Property of Scattering Matrix:Spectroscopy Phenomena and Sharp Overlapping Autoionization Resonances.

Sci Rep

Department of Physics and Center for Atomic and Molecular Nanosciences, Tsinghua University, Beijing, 100084, China.

Published: September 2017

AI Article Synopsis

Article Abstract

An extended atomic data base with sufficiently high precision is required in astrophysics studies and the energy researches. For example, there are "infinite" energy levels in discrete energy region as well as overlapping resonances in autoionization region. We show in this paper the merits of our relativistic eigenchannel R-matrix method R-R-Eigen based on the analytical continuation properties of scattering matrices for the calculations of the energy levels, overlapping resonances and the related transitions. Using Ne as an illustration example, the scattering matrices of Ne in both discrete and continuum energy regions are calculated by our R-R-Eigen method directly. Based on our proposed projected high dimensional quantum-defect graph (symmetrized), one can readily determine the accuracies of the calculated scattering matrices using the experimental energy levels in a systematical way. The calculated resonant photoionization cross sections in the autoionization region are in excellent agreement with the benchmark high resolution experiments. With the scattering matrices checked/calibrated against spectroscopy data in both discrete and continuum energy regions, the relevant dynamical processes should be calculated with adequate accuracies. It should then satisfy the needs of the astrophysical and energy researches.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5599530PMC
http://dx.doi.org/10.1038/s41598-017-11823-8DOI Listing

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