Oscillator strengths for transitions among the low-lying energy levels of S II

Details Oscillator strengths for transitions among the low-lying energy levels of S II Oscillator strengths for transitions among the low-lying energy levels of S II

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jphb...22.1153o&link_type=abstract

Journal of Physics B - Atomic, Molecular and Optical Physics (ISSN 0953-4075), vol. 22, April 28, 1989, p. 1153-1162. Research s

Mathematics

14

Atomic Structure, Energy Levels, Interstellar Matter, Oscillator Strengths, Quantum Mechanics, Ultraviolet Absorption, Hamiltonian Functions, Matrices (Mathematics), Satellite-Borne Instruments, Schroedinger Equation

Scientific paper

Accurate large-scale C I calculations of the oscillator strengths for transitions among the energy levels of the low-lying 3s2 3p3, 3s2 3p2(3P)4p, 3s 3p4, 3s2 3p2(3p)4s, and 3s2 3p2(3P)3d configurations of S II in the LS coupling approximation are presented, with special attention given to oscillator strengths for the astrophysically important transitions 3s2 3p3 4S03/2 to 3s 3p4 4Pe1/2, 3/2, and 5/2. These oscillator strengths are shown to be small due to the cancellation of relatively large contributions to the transition matrix elements from the 3s 3p4 and 3s2 3p2 3d configurations in the final state. The present theoretical estimates of the oscillator strengths for transitions to the fine-structure levels are found to lie within 5 percent of the experimentally-determined values.

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