K-Shell photoabsorption in Si11+: Relativistic contributions via Breit-Pauli R-matrix calculations

Hasoglu, M. F.; Gorczyca, T. W.; Manson, S. T.

doi:10.1088/1402-4896/ac0b84

K-Shell photoabsorption in Si¹¹⁺: Relativistic contributions via Breit-Pauli R-matrix calculations

Journal Article · Thu Sep 16 00:00:00 EDT 2021 · Physica Scripta

DOI:https://doi.org/10.1088/1402-4896/ac0b84· OSTI ID:1875556

Hasoglu, M. F. ^[1]; ^[2]; Manson, S. T. ^[3]

Hasan Kalyoncu University, Gaziantep (Turkey); Georgia State University
Western Michigan Univ., Kalamazoo MI (United States)
Georgia State Univ., Atlanta, GA (United States)

As a part of the investigation of the entire Si isonuclear sequence for x-ray spectral diagnostics, we focus on the Li-like Si¹¹⁺ ion, a stable component that features prominently in x-ray astrophysical spectra. In this work, we perform R-matrix calculations for the photoabsorption cross section of Si¹¹⁺ including relativistic contributions via the use of a Breit-Pauli Hamiltonian. Relativistic effects—predominantly spin-orbit splitting of resonances and mass-velocity and one-body Darwin global shifts of energies— are shown to be tractable and of importance for accuracy in x-ray spectral modeling data banks.

Research Organization:: Georgia State Univ., Atlanta, GA (United States)

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: FG02-03ER15428

OSTI ID:: 1875556

Journal Information:: Physica Scripta, Journal Name: Physica Scripta Journal Issue: 12 Vol. 96; ISSN 0031-8949

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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74 ATOMIC AND MOLECULAR PHYSICS
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K-Shell photoabsorption in Si11+: Relativistic contributions via Breit-Pauli R-matrix calculations

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K-Shell photoabsorption in Si¹¹⁺: Relativistic contributions via Breit-Pauli R-matrix calculations