![]() ![]() A more detailed description of this program and of our experimental observations for the infrared spectra of the noble gases has been given in Ref. This is one component of a broader program of observations and compilations for the noble gases currently in progress at NIST. In order to provide a comprehensive high-resolution description of the infrared spectrum of Ne, we made new observations with the National Institute of Standards and Technology (NIST) 2 m Fourier transform spectrometer (FTS). has little value as a description of the spectrum since it gives no intensities and includes only selected lines. These are the most accurate published measurements for neon in the infrared. based on hollow cathode spectra from the archives of the Fourier transform spectrometer of the National Solar Observatory at Kitt Peak National Observatory. Measurements for 118 infrared lines of neon were reported by Chang et al. provides no information about the relative intensities of these possible transitions in a high resolution spectrum, nor does it provide any basis for estimating the effective wavelength of the unresolved transitions at low resolution. In some cases as many as five classfications and calculated wavelengths are associated with a single feature in the observed spectrum. Because of the low resolution and accuracy of the experimental spectra, many lines are multiply classified. The relative intensities in this list are experimental values from Humphreys’s grating observations, but the wavelengths are calculated from the Ne energy levels of Kaufman and Minnhagen. The most complete line list for Ne at wavelengths longer than 11 000 Å was given by Humphreys based on spectra recorded with a scanning 1 m grating spectrometer. At longer wavelengths, spectra obtained with infrared scanning instruments have resolution and accuracy that are very low by current standards. Photographic spectra recorded with large grating spectrographs in the near infrared region have reasonably high resolution but extend to only about 12 000 Å. Despite the fact that Ne is frequently used as a buffer gas in sources for laboratory spectroscopy, no comprehensive description of its spectrum in the extraphotographic infrared region has appeared in the literature. Neon discharges are widely used in scientific, technical, and commercial applications.
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