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29 March 2024
 
  » arxiv » cond-mat/0311628

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Breakup of the Hydrogen Bond Network In Water:The Momentum Distribution of the Protons
G. Reiter ; T.Abdul-Redah ; J.C.LI ; J.Mayers ; P. Platzman ;
Date 27 Nov 2003
Subject cond-mat
AbstractNeutron Compton Scattering measurements presented here of the momentum distribution of hydrogen in water at temperatures slightly below freezing to the supercritical phase show a dramatic change in the distribution as the hydrogen bond network becomes more disordered. Within a single particle interpretation, the proton moves from an essentially harmonic well in ice to a slightly anharmonic well in room temperature water, to a deeply anharmonic potential in the supercritical phase that is best described by a double well potential with a separation of the wells along the bond axis of about .3 Angstroms. Confining the supercritical water in the interstices of a C60 powder enhances this anharmonicity. The changes in the distribution are consistent with gas phase formation at the hydrophobic boundaries.
Source arXiv, cond-mat/0311628
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