Photoabsorption spectrum of atomic sulphur

The photoabsorption spectrum of atomic sulphur was obtained in the 1220-840 AA wavelength region on a 3m normal incidence spectrograph using the flash pyrolysis technique. The previously known photoionisation cross section in the 1200-940 AA range has been extended and confirmed on the relative scale. The new discrete line absorption data have enabled the authors to extend the principal series limiting on ⁴S to n=23. Of the seven Rydberg series limiting on ²D and ²P of S II reported recently, six could be identified on the plates. They have been revised and confirmed. Four additional Rydberg series limiting on ²D and ²P have been observed and interpreted. All lines below 1220 AA assigned to S I have been reported.