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. 2011 Jul 11;108(30):12206-12211. doi: 10.1073/pnas.1100238108

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Fig. 4. — The Q-dependent generalized librational density of states G(E) of H₂O are measured by FANS at NCNR. The G(E) of H₂O confined in MCM-41-S is measured twice at T = 180 K, P = 2,500 bars: one prepared from cooling (black), the other from warming (red). The G(E) of H₂O confined in MCM-41-S at T = 10 K, P = 2,500 bars is also measured after cooling from room temperature to 10 K at 2,500 bars (cyan). For comparison, the G(E) of bulk H₂O ice is measured at 30 K, 1 bar in the identical pressure cell (blue dashed line) to show the difference between crystalline and amorphous water.