Quasi-elastic neutron scattering in the multi-GPa range and its application to liquid water
Quasi-elastic neutron scattering in the multi-GPa range and its application to liquid water
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DOI：
10.1063/1.4828661
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发表时间：
2013-11-04
影响因子：
4
通讯作者：
Bove, L. E.
中科院分区：
文献类型：
--
作者：
Klotz, S.;Straessle, Th.;Bove, L. E.
我们提出了一种方法，允许准弹性中子散射（QENS）在多GPa的压力，即，压力条件，这是一个数量级高于可能与QENS到目前为止。该技术使用了一个对置砧几何形状与样品室的环形的形式，最大限度地减少了多次散射的影响。该方法已被应用于测量水的自扩散系数在400 K至3 GPa。结果表明，这种方法研究扩散在一个大的压力和温度范围内的潜力。(C)2013 AIP Publishing LLC.
We present a method which allows quasi-elastic neutron scattering (QENS) at multi-GPa pressures, i.e., pressure conditions which are an order of magnitude higher than possible with QENS till now. The technique uses an opposed-anvil geometry with a sample chamber in the form of a toroid which minimizes multiple scattering effects. This method has been applied to measurements of the self-diffusion coefficient of water at 400K up to 3 GPa. The results demonstrate the potential of this method for studying diffusion over a large pressure and temperature range. (C) 2013 AIP Publishing LLC.