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The pressure broadening coefficient for the I(2P1/2→2P3/2) transition by O2 has been measured using a high resolution Fabry-Perot scanning interferometer. Spontaneous emission from a microwave excited mixture of oxygen and iodine was spectrally resolved using the center spot scanning technique. The broadening coefficient was measured at O2 pressures of 1–10 Torr and found to be 7.5±1.5 MHz/Torr at 300 K.
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Neumann et al. (1983) studied this question.
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