期刊
PHYSICA SCRIPTA
卷 96, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1402-4896/ac0b84
关键词
numbers; 34; 80; Lx; 31; 15; vj; 32; 80; Zb; photoionization; inner shell; R-matrix
资金
- NASA APRA [NNX17AD41G]
- US Department of Energy, Office of Basic Sciences, Division of Chemical Science, Geosciences and Biosciences [DE-FG02-03ER15428]
- NASA [NNX17AD41G, 1003272] Funding Source: Federal RePORTER
In investigating the Si isonuclear sequence for x-ray spectral diagnostics, particular attention is paid to the stable Li-like Si11+ ion. R-matrix calculations are conducted for the photoabsorption cross section of Si11+, incorporating relativistic contributions to improve accuracy in x-ray spectral modeling data banks. Relativistic effects, such as spin-orbit splitting and global shifts of energies, are found to be manageable and significant for this purpose.
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. 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.
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