Tracer diffusion of tritiated heavy water (DTO) in heavy water (D2O) under pressure
Tracer diffusion of tritiated heavy water (DTO) in heavy water (D2O) under pressure
复制标题
压力下氚化重水 (DTO) 在重水 (D2O) 中的示踪扩散
DOI：
10.1039/f19767201267
复制
发表时间：
1976
期刊：
影响因子：
--
通讯作者：
L. Woolf
中科院分区：
文献类型：
--
作者：
L. Woolf
DTO在D2 O中的示踪剂扩散系数报告在280和328 K之间的温度下的压力高达约2.2千巴。扩散系数的压力依赖性与自旋-晶格弛豫时间（T1）的压力依赖性显著不同。高达约313 K的扩散系数显示出一个初始的压力增加到一个广泛的最大值。随着温度的升高，最大值的位置移向较低的压力。在最低温度下，在1.6 kbar压力下获得约17%的扩散系数的最大增加：约为H2O相应增加的两倍。D_2O和H_2O的粘度积（Dη/T）V几乎相同。D_2O在恒容条件下的扩散活化能大于H_2O。
The tracer diffusion coefficient of DTO in D2O is reported at temperatures between 280 and 328 K for pressures up to about 2.2 kbar. The pressure dependence of the diffusion coefficient is considerably different to that of the spin-lattice relaxation time (T1). Up to about 313 K the diffusion coefficients show an initial increase with pressure to a broad maximum. The position of the maximum moves to lower pressures as the temperature is increased. At the lowest temperature a maximum increase in the diffusion coefficient of about 17 % was obtained at 1.6 kbar pressure: about double the corresponding increase for H2O. The viscosity product (Dη/T)V for D2O is almost identical with that for H2O. Activation energies for diffusion of D2O at constant volume are greater than those for H2O.