Molecular motion in supercooled glycerol a Mössbauer scattering experiment
Molecular motion in supercooled glycerol a Mössbauer scattering experiment
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过冷甘油中的分子运动穆斯堡尔散射实验
DOI：
10.1080/00268977700101511
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发表时间：
1977
影响因子：
1.7
通讯作者：
D. Quitmann
中科院分区：
文献类型：
--
作者：
M. Soltwisch;M. Elwenspoek;D. Quitmann
在T=-16 °C下，用λ=0·86 A的光子对液态甘油进行瑞利散射。利用穆斯堡尔效应，测量了动量在0·6A ~（-1）~ 4·2A ~（-1）范围内的准弹性线的宽度和强度，以及非弹性散射强度。为了定量分析结果，建立了分子运动模型。它包括分子结构因子，质量中心的径向分布函数，质量中心和分子取向的随机游走扩散，以及高频运动;假设双折射-旋转耦合产生共同的跳跃时间。并与其它实验，特别是核磁共振实验进行了比较。放松.
Rayleigh scattering of photons with λ=0·86 A was applied to liquid glycerol at T=-16·5°C. Using the Mossbauer effect, the width and intensity of the quasi-elastic line as well as the inelastic scattering intensity were measured for momentum transfers between 0·6 A-1 and 4·2 A-1. A model of the molecular motions is developed in order to analyse the results quantitatively. It comprises the molecular structure factor, a radial distribution function for the centres of mass, random-walk diffusion of the centres of mass and of the molecular orientation, and a high frequency motion; translation-rotation coupling is assumed to produce a common jump time. The results are compared with other experiments, especially N.M.R. relaxation.