The refractive dispersion of nitrogen has been measured for the first time in the 1649 A to 2042 A region by means of a high-dispersion vacuum spectrograph. The data fit the following equation to ±0.13%: n-1=6.3622·10445.989·108-ν2+32.453·1061065.11·108-ν2.The resonance frequencies and oscillator strengths obtained from this equation have no real significance because the data are too inaccurate and were obtained at wavelengths much longer than the nearest allowed transition. Improved measurements at shorter wavelengths would be desirable.
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P. G. Wilkinson (1960) studied this question.
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