Precessors model

We have also shown that some originally proposed (e.g., in GT2) properties of the hat potential turn out to be excessively abstract, so that we disregarded them. We mean here (i) absence of free rotors, performing circular motion, since in the water/ice structure there is no place for such a motion, and (ii) nonexistence of precessors, since, as it appears, the libration of dipoles in a diametric cross section of the hat-like potential well dominates. On the other hand, the well s curvature is important for modeling the spectra, since, unlike the well depth, this curvature strongly depends on temperature and fluid phase state. 

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