Abstract
The application of interferometric and grating measurements in the long wavelength region of the germanium arc spectrum in connection with the extended analysis of this spectrum permits the calculation of precise wavelengths of 69 Ge i lines in the vacuum ultraviolet region on the basis of Ritz’s combination principle. This furnishes a welcome enrichment and extension of the list of Ge i vacuum ultraviolet standards obtained by VanVeld and Meissner on the same basis by the use of precision measurements in the short wavelength region. Most of these lines can be recommended as reliable secondary standards in the vacuum region.
© 1958 Optical Society of America
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