DELTA-N-LESS-THAN-OR-EQUAL-TO-2 ALLOWED TRANSITIONS IN NEUTRAL SULFURWITHIN THE VISIBLE AND INFRARED SPECTRAL RANGES

New oscillator strengths have been calculated for an Delta n less than or equal to 2 allowed transitions of astrophysical interest in S I. C onfiguration interaction (CI) and the most important relativistic effe cts were taken into account in the computations performed with the hel p of two independent theoretical methods, HFR and SST, whose accuracy is compared in detail. The solar abundance of sulphur established on t he basis of the present oscillator strengths is found to be A(S) = 7.3 3+/-0.04 in the usual logarithmic scale. This new value is somewhat la rger than the result obtained from f values estimated with the Coulomb approximation (CA) but is in good agreement with the meteoritic abund ance.