Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
J Chem Phys. 2009 Nov 21;131(19):194502. doi: 10.1063/1.3259882.
We report on small-angle x-ray scattering measurements on liquid water aimed at characterizing the pressure evolution of its large-scale structure. Diffraction profiles have been fitted assuming a Lorentzian dependence on the exchanged momentum. As a result, we observe an anomalous behavior of the diffracted intensity that tends to disappear, increasing either the pressure or the temperature. This effect is discussed in detail and imputed to the ability of hydrostatic pressure to weaken hydrogen bonds.
我们报告了关于液态水的小角度 X 射线散射测量，旨在描述其大尺度结构的压力演化。通过假设洛伦兹函数与交换动量的关系，对衍射谱进行拟合。结果表明，我们观察到衍射强度的异常行为，这种行为随着压力或温度的升高而趋于消失。详细讨论了这种效应，并归因于静压削弱氢键的能力。
