Resolved line profiles of atomic oxygen resonance lamps used in the upper atmosphere

Computer Science

Scientific paper

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Line Shape, Luminaires, Oxygen Atoms, Resonance Scattering, Spectral Resolution, Upper Atmosphere, Gas Pressure, Helium, Normal Density Functions, Partial Pressure, Spectral Energy Distribution

Scientific paper

Line profiles of the 130-nm OI(3P-3S) resonance triplet emitted by RF excited helium/oxygen lamps have been resolved using a photoelectric echelle spectrometer. These profiles have been reproduced using a self-absorbed double-Gaussian spectral distribution in which the relative amplitudes of the Gaussian components are functions of the oxygen and helium partial pressures in the lamps. Reasons for the form of the observed spectral distribution are suggested and the importance of the spectrometer measurements to studies of atomic oxygen in the upper atmosphere involving this type of lamp illustrated.

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