WAVELENGTHS, ENERGY LEVELS, LIFETIMES, AND WEIGHTED OSCILLATOR STRENGTHS FOR THE S VIII SPECTRUM

Journal Article · Sat Oct 01 00:00:00 EDT 2011 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/196/2/19· OSTI ID:21560320

Pagan, C J. B. ^[1]; Cavalcanti, G H; Trigueiros, A G ^[2]; Jupen, C ^[3]

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1. School of Electrical and Computer Engineering, University of Campinas (UNICAMP), 13083-970 Campinas, SP (Brazil)
2. Physics Institute, Fluminense Federal University (UFF), Campus da Praia Vermelha-Gragoata, 24210-340, Niteroi, RJ (Brazil)
3. Atomic Astrophysics, Lund Observatory, Lund University, Box 43, SE-22100, Lund (Sweden)

The weighted oscillator strengths (gf) and lifetimes for S VIII presented in this work were obtained by a multiconfigurational Hartree-Fock relativistic approach. In this calculation, the electrostatic energy parameters were optimized by a least-squares procedure in order to improve the adjustment to experimental energy levels. The values for gf and lifetimes were then calculated on the basis of these adjusted parameters. New classifications are proposed for energy levels belonging to the 4s and 4d configurations and lines related to them.

• OSTI ID: 21560320
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 196, Issue 2; Other Information: DOI: 10.1088/0067-0049/196/2/19; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ENERGY LEVELS
HARTREE-FOCK METHOD
LEAST SQUARE FIT
LIFETIME
OSCILLATOR STRENGTHS
WAVELENGTHS
APPROXIMATIONS
CALCULATION METHODS
MATHEMATICAL SOLUTIONS
MAXIMUM-LIKELIHOOD FIT
NUMERICAL SOLUTION