Absorption spectrum of Si I between 1500 and 1900 A

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Absorption Spectra, Electron Transitions, Silicon, Solar Spectra, Spectral Correlation, Spectrum Analysis, Aerial Photography, Atomic Energy Levels, Data Correlation, High Resolution, Rocket Sounding, Tables (Data)

Scientific paper

The absorption spectrum of Si I in the wavelength region 1500-1900 A has been photographed at high resolution. The silicon vapor was produced in a 122-cm-long King furnace at 1800-2300 C. Forty-two Rydberg series have been observed from the ground-state terms 3p2 3P and 1D to terms associated with the 3pns and 3pnd configurations. All of the series from these configurations with J less than 4 have been extended with the 3 pnd 3D3 o levels reaching n equals 56. Numerous perturbations have been observed. Some initial correlations with recent rocket solar spectra in this wavelength range are illustrated. Lists of wavelengths, intensities, and derived energy levels are presented. An ionization limit has been determined from the nd 3D3 o series.

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