Hyperfine structure in the arc spectrum of xenon

From measurements of the hyperfine structure of 33 lines in the visible and near infrared regions of the arc spectrum of 129Xe the doublet splittings, and hyperfine structure constants, A, have been found for 27 levels in this spectrum, 14 of which have not previously been measured accurately. Measurements of the hyperfine structure of three lines in the near infrared spectrum of 131Xe have yielded the hyperfine structure constants A and B of three levels of this spectrum, and have enabled an accurate spectroscopic determination to be made of the ratio of the magnetic moments of the nuclei of 129Xe and 131Xe; measurements of partially resolved hyperfine structure of four more lines in the near infrared have enabled values to be found for the hyperfine structure constants B for four more levels. The experimental values for the hyperfine structure A-constants of the levels of 129Xe are compared with the values calculated by Liberman (1969, 1970); the agreement with the experimental values is excellent for levels with the configurations 5p56s, 5p56p and 5p57p. The average of the ratios of the A-constants of levels of 129Xe and 131Xe is –3.378±0.01; this differs by less than 0.003 from the ratio found from nuclear resonance measurements of the structures of the levels 6s3/22 of 129Xe and 131Xe (Faust & McDermott 1961).