Tagged-particle motion in viscous glycerol: Diffusion-relaxation crossover

被引：48

作者：

Wuttke, J

Chang, I

Randl, OG

Fujara, F

Petry, W

机构：

[1] UNIV MAINZ,INST PHYS CHEM,D-55099 MAINZ,GERMANY

[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

[3] UNIV DORTMUND,D-44221 DORTMUND,GERMANY

来源：

PHYSICAL REVIEW E | 1996年 / 54卷 / 05期

关键词：

D O I：

10.1103/PhysRevE.54.5364

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Incoherent neutron-backscattering and field gradient NMR are combined to measure the self-correlation function of protons in glycerol. Extensive simulations reveal and delimit systematic effects of multiple scattering. At microscopic wave numbers, tagged-particle motion couples strongly to structural relaxation. Between 1 and 0.1 Angstrom(-1) a crossover to diffusional motion is observed: quasielastic stretching diminishes and the wave-number dependence of the mean relaxation time approaches q(-2).

引用

页码：5364 / 5369

页数：6

共 35 条

[21] DYNAMIC ANOMALY IN THE GLASS-TRANSITION REGION OF ORTHOTERPHENYL - A NEUTRON-SCATTERING STUDY [J].