Interferometric Wavelength Determinations in the First Spectrum of ^136Xe

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Abstract
Interferometric wavelength determinations in the first spectrum of 131Xe, covering the photographically observable region between 3949 and 11 088 Å, and the nonphotographic region between 12 626 and 35 079 Å, are reported. Photographic intercomparisons were made with I.A.U.-recommended standards of 198Hg at 4047 and 4359 Å. Study of the properties of several ir lines of Ar i led to the adoption of the line of wavelength (in air), 16 940 Å, as the most suitable standard for the radiometric intercomparisons. Wavelengths of a total of 221 lines are reported, including 15 between 12 626 and 35 070 Å. Energy levels have been determined to the extent permitted by the interferometric observations. All material on this spectrum presented at recent meetings of the Optical Society of America, or contained in internal reports, is included.
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