Optical Absorptions in Solid Oxygen

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  • Fujiwara Takeo
    Department of Applied Physics, Faculty of Engineering, University of Tokyo

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Optical absorptions in the solid oxygen are investigated theoretically by using pair approximation.<BR>The selection rules of the electric dipole transition is given. The expressions for the oscillator strength and the energy shift are derived explicitly. It is shown that some absorption peaks are due to the transitions in the first neighbor pairs and others in the third neighbor pairs. An essential role of the molecular librations is found to be the origin of the widely extending bands. The absorption band 3Σg−+3Σg−→1Σg++1Σg+ is assigned as the libron-assisted band. Using reasonable values for some unknown quantities, a satisfactorily good agreement with experiment is obtained for the oscillator strengths and energy shifts.

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