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Below excitation energies of 22 500 cm−1 biacetyl behaves as a small molecule as evidenced by the pressure dependence of its phosphorescence and the structure of the excitation spectrum. The sudden transition to large (statistical) molecule behavior at this energy can be explained by the presence of a 3Bg state for which there is also theoretical evidence. Original language English Pages (from-to) 2061-2067 Number of pages 7 Journal Journal of Chemical Physics Volume 59 Issue number 4 DOIs https://doi.org/10.1063/1.1680292 Publication status Published - 1973
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Drent et al. (1973) studied this question.
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