TY - JOUR
T1 - Dynamics in viscous orthoterphenyl
T2 - Results from coherent neutron scattering
AU - Bartsch, E.
AU - Fujara, F.
AU - Legrand, J. F.
AU - Petry, W.
AU - Sillescu, H.
AU - Wuttke, J.
PY - 1995
Y1 - 1995
N2 - We have measured coherent neutron scattering from deuterated orthoterphenyl on a spin echo and a backscattering spectrometer. In agreement with mode coupling theory, pair correlations decay in two steps and follow the same scaling laws as those found previously for self-correlations. The temperature evolution of the intermediate plateau is compatible with the previously established Tc=290 K. The spatial resolution has not been sufficient to fully resolve oscillations of parameters as functions of Q, which are predicted by mode coupling theory. Within this limitation, we find that the double peak structure of S(Q) is not expressed in the nonergodicity parameter fQc and that the de Gennes narrowing is missing.
AB - We have measured coherent neutron scattering from deuterated orthoterphenyl on a spin echo and a backscattering spectrometer. In agreement with mode coupling theory, pair correlations decay in two steps and follow the same scaling laws as those found previously for self-correlations. The temperature evolution of the intermediate plateau is compatible with the previously established Tc=290 K. The spatial resolution has not been sufficient to fully resolve oscillations of parameters as functions of Q, which are predicted by mode coupling theory. Within this limitation, we find that the double peak structure of S(Q) is not expressed in the nonergodicity parameter fQc and that the de Gennes narrowing is missing.
UR - http://www.scopus.com/inward/record.url?scp=0000788368&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.52.738
DO - 10.1103/PhysRevE.52.738
M3 - Article
AN - SCOPUS:0000788368
SN - 1063-651X
VL - 52
SP - 738
EP - 745
JO - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
JF - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
IS - 1
ER -