Eighth spectrum of antimony: Sb viii Revised ^2D interval: Sb vii

Abstract

The spectrum of antimony was photographed in the 173–264-Å region on a variety of grazing-incidence spectrographs using a triggered spark source. All levels of the 4d8 configuration and 102 of 110 levels of the 4d75p configuration of Sb viii have been established. The least-squares-fitted energy-parameter calculations support the analysis. Two hundred fifty-six lines have been classified in this spectrum. Improved wavelength values have led to obtaining a better value of 10 397 ± 2 cm−1 for the 4d9 2D interval and a revision of four levels of Sb vii reported earlier [ J. Opt. Soc. Am.69, 132 ( 1979); J. Opt. Soc. Am.70, 895 ( 1980)].