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    Optical Detection Of Paramagnetic Resonance In The Excited State Of F Centers In Cao

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    A detailed analysis of this double-resonance experiment shows that the emission takes place from the P3 excited level whose degeneracy is lifted by the Jahn-Teller coupling to Eg modes of vibration. An energy-level crossing effect is observed and its origin discussed. © 1972 The American Physical Society.28191268127
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