DIFFUSION AND NUCLEAR SPIN RELAXATION IN WATER
DIFFUSION AND NUCLEAR SPIN RELAXATION IN WATER
复制标题
DOI：
10.1103/physrev.111.1201
复制
发表时间：
1958-01-01
期刊：
影响因子：
--
通讯作者：
CARR, HY
中科院分区：
文献类型：
--
作者：
SIMPSON, JH;CARR, HY
用核磁共振自由进动技术测量了质子在普通水中0 ~ 100℃范围内的扩散系数和自旋晶格弛豫时间。与以前的扩散测量不同，目前的数值描述的是质子的扩散，而不是作为示踪剂引入的外来同位素。在实验误差范围内，Stokes-Einstein关系充分描述了粘度和扩散的相对温度依赖性，但在40℃以上，自旋晶格弛豫并不像预测的那样跟随粘度。
The diffusion coefficient and the spin lattice relaxation time of protons in ordinary water have been measured in the temperature range 0-100 C using nuclear magnetic resonance free precession techniques. Unlike previous diffusion measurements, the present values describe the diffusion of protons rather than foreign isotopes introduced as tracers. To within the experimental error the Stokes-Einstein relation adequately describes the relative temperature dependence of viscosity and diffusion, but above the vicinity of 40 C the spin lattice relaxation does not follow the viscosity in the predicted manner.