Effect of Simultaneous Doppler and Collision Broadening and of Hyperfine Structure on the Imprisonment of Resonance Radiation

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Abstract
The transmission coefficient defined by Holstein for resonance radiation has been calculated when Doppler and collision broadening of the resonance line are present simultaneously. From this a simple formula is inferred for the imprisonment lifetime of the resonance radiation under this condition. The complication of the hyperfine structure is also taken into account and the results are found to give good agreement with experiments in mercury.