Oscillator strengths of prominent resonance transitions in neutral sulphur

Accurate configuration-interaction wavefunctions are used to calculate oscillator strengths of resonance transitions 3p(43)P-3s(3)4s(3)S(o), 3p(43)P-3p(3)4s'D-3(o) and 3p(43)P-3p(3)3d(3)D(o) in S I. The interaction between the 3p(3)4s'D-3(o) and 3p(3)3d(3)D(o) states is represented by both correlation and spectroscopic d functions. The excellent agreement between the present calculation and measurements removed long-standing large discrepancies between theory and experiment for the 3p(43)P-3p(3)4s'D-3(o) transition.