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- W2004191517 abstract "Electron impact excitation collision strengths and rates for transitions between fine-structure levels of the 3s2np (n = 3–6), 3s3p2, 3s2ns (n = 4–6), 3s2nd (n = 3–5), 3s2nf (n = 4–5), and 3s3p3d configurations in Si II are calculated by using the Breit-Pauli B-spline R-matrix approach. The 31 target levels have been included in the close-coupling expansion in our collision calculation. The multiconfiguration Hartree-Fock method with term-dependent nonorthogonal orbitals is employed for an accurate representation of the target wave functions. The target levels have been described by using both spectroscopic and correlation radial functions. The atomic wave functions yield excitation energies that are in excellent agreement with experiment and other reliable calculations. The relativistic corrections are included through the one-body mass correction, Darwin, and spin-orbit operators in the Breit-Pauli Hamiltonian. The effective collision strengths have been calculated by integrating total resonant and nonresonant collision strengths over a Maxwellian distribution of electron energies, and these are presented over a wide temperature range suitable for modeling of astrophysical plasmas. Significant differences are noted with the previous eight-state R-matrix calculation, particularly for transitions involving higher excitation levels." @default.
- W2004191517 created "2016-06-24" @default.
- W2004191517 creator A5030445705 @default.
- W2004191517 date "2008-12-01" @default.
- W2004191517 modified "2023-09-23" @default.
- W2004191517 title "Collision Strengths for Electron Scattering from Siii" @default.
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- W2004191517 doi "https://doi.org/10.1086/591849" @default.
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