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Interference distortion of the 73 cm−1 absorption line in polyethylene

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Prettl, Wilhelm ; Frank, W. F. X.
Date of publication of this fulltext: 26 Oct 2010 12:23


The decrease of the absorption strength of the 73 cm−1 line in polyethylene and the strong antiresonance occuring above 310K at the high frequency side of the line are explained by assuming a Fano type coupling between the 73 cm−1 phonon and a continuum of infrared active vibrational modes. The parameters determining the line shape are deduced from experimental absorption curves and conceivable coupling mechanisms are discussed.

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