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 (formula presented) 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-Mössbauer factor with a square root dependence we obtain a mode-coupling critical temperature of (formula presented).
| Original language | English |
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| Pages (from-to) | 1-8 |
| Number of pages | 8 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 66 |
| Issue number | 18 |
| DOIs | |
| State | Published - 2002 |