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- W2897547073 endingPage "120" @default.
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- W2897547073 abstract "We identify and quantify several practical effects likely to be present in both static and ultrafast electron-scattering experiments that may interfere with the Debye–Waller (DW) effect. Using 120-nm thick, small-grained, polycrystalline aluminum foils as a test system, we illustrate the impact of specimen tilting, in-plane translation, and changes in z height on Debye–Scherrer-ring intensities. We find that tilting by less than one degree can result in statistically-significant changes in diffracted-beam intensities for large specimen regions containing > 105 nanocrystalline grains. We demonstrate that, in addition to effective changes in the field of view with tilting, slight texturing of the film can result in deviations from expected DW-effect behavior. Further, we find that in-plane translations of as little as 20 nm also produce statistically-significant intensity changes, while normalization to total image counts eliminates such effects arising from changes in z height. The results indicate that the use of polycrystalline films in ultrafast electron-scattering experiments can greatly reduce the negative impacts of these effects as compared to single-crystal specimens, though it does not entirely eliminate them. Thus, it is important to account for such effects when studying thin-foil specimens having relatively short reciprocal-lattice rods." @default.
- W2897547073 created "2018-10-26" @default.
- W2897547073 creator A5013551933 @default.
- W2897547073 creator A5076695150 @default.
- W2897547073 date "2019-01-01" @default.
- W2897547073 modified "2023-10-14" @default.
- W2897547073 title "Sources of error in Debye–Waller-effect measurements relevant to studies of photoinduced structural dynamics" @default.
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