TAGGED-PARTICLE MOTION IN VISCOUS GLYCEROL - DIFFUSION-RELAXATION CROSSOVER

Authors
WUTTKE J CHANG I RANDL OG FUJARA F PETRY W
Citation
J. Wuttke et al., TAGGED-PARTICLE MOTION IN VISCOUS GLYCEROL - DIFFUSION-RELAXATION CROSSOVER, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 54(5), 1996, pp. 5364-5369
Citations number
35
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
Journal title
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics → ACNP
ISSN journal
1063651X
Volume
54
Issue
5
Year of publication
1996
Pages
5364 - 5369
Database
ISI
SICI code
1063-651X(1996)54:5<5364:TMIVG->2.0.ZU;2-Q
Abstract
Incoherent neutron-backscattering and field gradient NMR are combined to measure the self-correlation function of protons in glycerol. Exten sive simulations reveal and delimit systematic effects of multiple sca ttering. At microscopic wave numbers, tagged-particle motion couples s trongly to structural relaxation. Between 1 and 0.1 Angstrom(-1) a cro ssover to diffusional motion is observed: quasielastic stretching dimi nishes and the wave-number dependence of the mean relaxation time appr oaches q(-2).