Experimental Determination of Four-Time Stimulated Echoes in Liquids, Colloidal Suspensions, and Crystals |
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Authors: | G Hinze R Böhmer G Diezemann H Sillescu |
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Institution: | Institut für Physikalische Chemie, Johannes Gutenberg-Universität, D55099 Mainz, Germany |
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Abstract: | Four-time stimulated echo experiments have been used to monitor the temporal evolution of the reorientation rates of deuterated molecules or colloidal suspensions. We present extended phase cycles for this seven-pulse experiment. In order to test its performance three vastly different materials are chosen. These include a crystal in which the molecules carry out well-defined 180° flips and a supercooled liquid characterized by a distribution of jump angles centered around 10°. As an example for rotational diffusion, data on a concentrated suspension of polystyrene spheres in a viscous medium are presented. |
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