Photon Correlation Measurements at Large Lag Times: Improving Statistical Accuracy
Klaus SchätzelInstitut für Angewandte Physik der Universität , D-2300, Kiel, F.R. GermanyM. DrewelInstitut für Angewandte Physik der Universität , D-2300, Kiel, F.R. GermanySven StimacInstitut für Angewandte Physik der Universität , D-2300, Kiel, F.R. Germany
1988en
ABI
Abstract
Abstract Dynamic light scattering and photon correlation spectroscopy are able to resolve large ranges of coherence times, and hence of scattering particle size or constant of diffusion, in a single measurement if a modern multiple-tau correlator is used. However, particular problems like bias and unsatisfactory statistical accuracy typically arise at very large lag-times. A novel normalization scheme is presented which cures the accuracy problem and provides reliable photon correlation data at large lag-times within significantly reduced total measurement times.
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Cited by 40 references