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Astron. Astrophys. 343, 634-640 (1999)

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Oscillator strengths for transitions of astrophysical importance in SIII

E. Charro *  1 and I. Martín 2

1 Department of Applied Mathematics and Theoretical Physics, The Queen's University of Belfast, Belfast BT7 1NN, Ireland
2 Departamento de Química Física, Universidad de Valladolid, E-47011 Valladolid, Spain

Received 18 August 1998 / Accepted 3 November 1998


Relativistic Quantum Defect Orbital (RQDO) calculations, with and without explict account for core-valence correlation, have been performed on dipole-allowed transitions between the levels belonging to the [FORMULA], [FORMULA] [FORMULA], [FORMULA] ns [FORMULA] and [FORMULA] configurations of the Si-like ion SIII in the LS-coupling scheme. The present oscillator strengths, which are of considerable interest in astrophysics, are compared with other theoretical results and laboratory measurements, although the latter are extremely scarce for fine-structure transitions.

Key words: atomic data – atomic processes

* On leave of absence from Departamento de Química Física, Universidad de Valladolid (Spain).

© European Southern Observatory (ESO) 1999

Online publication: March 1, 1999