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Measured fluorescence lifetimes of individual rovibronic levels in SiH2 (Ã 1B1, 0n0, n=1,2,3), vary irregularly from one level to the next. The distribution of these fluctuations is well fitted by the procedure of maximal entropy. This suggests that the intramolecular evolution at that energy range (∼18 000 cm−1) is chaotic and uniformly samples its available phase space.
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Engel et al. (1987) studied this question.
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