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Figure 8
(a) 3D surface plot of the correlation value as a function of scattering vector q and correlation time τ. (b) Correlation curves for selected q, showing that the correlation drops significantly after ∼100 s (450 MGy). (c) Mass-loss model for the XPCS simulations. The polymer is drawn in green, while the metal coating is gray. The polymer within the volume delineated by r(tsim) was set equal to 75% of the original polymer density, where tsim represents the accumulated exposure time. The scattering pattern from the model was calculated at each time step for use in XPCS analysis. (d) Correlation function from the simulated dataset. The scattering pattern from a sphere where the polymer density was gradually decreased was calculated, and the XPCS functions were extracted. The correlation functions have a minimum at q ≃ 0.05 nm−1, as in the observed XPCS curved from the experimental data.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 4| July 2018| Pages 1162-1171
https://doi.org/10.1107/S160057751800588X
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