Dipartimento di Fisica E Amaldi, Università degli Studi Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy.
Phys Rev Lett. 2011 Jun 24;106(25):255502. doi: 10.1103/PhysRevLett.106.255502. Epub 2011 Jun 22.
A deep inelastic neutron scattering experiment, performed on D(2)O in the stable and metastable liquid phases, provides evidence for isotope quantum effects in the proton or deuteron single particle dynamics along the hydrogen bond. The deuteron mean kinetic energy extracted from the experimental data in the metastable supercooled phase (T = 276.15 K) exceeds the zero point energy and scales as sqrt[2] with that of protons in supercooled light water, at T = 269.15 K. The present data support the suggestion that even small changes in the short range environment of a deuteron or proton have a strong influence on its quantum behavior.
一项在稳定和亚稳液相中的 D(2)O 上进行的深非弹性中子散射实验，为氢结合中质子或氘核单粒子动力学的同位素量子效应提供了证据。在亚稳过冷相中（T = 276.15 K）从实验数据中提取的氘核平均动能超过了零点能，并与在 T = 269.15 K 的过冷轻水中的质子的动能成 sqrt[2]的比例。目前的数据支持这样的观点，即即使是氘核或质子的短程环境的微小变化，也会对其量子行为产生强烈影响。
