Study of fine and hyperfine structures in the spectrum of neutral antimony (^121Sb i)

The spectrum of neutral 121Sb emitted by an electrodeless discharge lamp has been observed in the range 2 536–24 786 cm−1. The wavelengths of 617 lines have been measured. The hyperfine-structure splitting factors of the levels were established for 77% of these lines. Thirty-two new energy levels were found, and several J values were revised. The Slater–Condon method was used for the interpretation of levels in both parities, and the multiconfiguration eigenfunctions were applied to the parametric study of the hyperfine-structure factors A and B. The multichannel quantum-defect theory analysis of high odd levels having J = 1/2 and J = 3/2 was also revised.