Structural relaxation in a viscous liquid studied by quasielastic nuclear forward scattering

I. Sergueev, H. Franz, T. Asthalter, W. Petry, U. Van Bürck, G. V. Smirnov

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

10 Zitate (Scopus)

Abstract

Quasielastic nuclear forward scattering (QNFS) of synchrotron radiation is employed as a probe of slow glass dynamics, in particular for the determination of the stretching parameter β in the Kohlrausch-Williams-Watts relaxation function. The influence of this type of relaxation on multiple scattering is investigated in detail, and experimental results on the dynamics of the molecular glass former ferrocene/dibutylphthalate in the undercooled viscous state are presented. We observe a temperature independent stretching parameter of 0.47(2). Fitting the high temperature breakdown of the Lamb-Mossbauer factor with a square root dependence we obtain a mode-coupling critical temperature of Tc = 202 K.

OriginalspracheEnglisch
Aufsatznummer184210
Seiten (von - bis)1842101-1842108
Seitenumfang8
FachzeitschriftPhysical Review B - Condensed Matter and Materials Physics
Jahrgang66
Ausgabenummer18
PublikationsstatusVeröffentlicht - 1 Nov. 2002

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