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Figure 2
(a) Decomposition of the scattering intensity into Bragg and diffuse components. Two sets of closely spaced peaks model the diffraction of the crystalline phases while a broadband function models the diffuse component. (b) Integrated diffuse scattering intensity expressed as a fraction of the total measured scattering as a function of pump laser fluence and pump–probe delay. The signal is designated `excess' because the crystal-diffuse part, measured at negative time delay, has been subtracted. Dashed lines are common fits to an exponential function to obtain the relaxation rate. (c) Fluence dependence of the asymptotic excess diffuse signal. Dashed lines indicate two fluence regimes separated by a critical fluence of 330 mJ cm−2.

IUCrJ
Volume 10| Part 6| November 2023| Pages 656-661
ISSN: 2052-2525
https://doi.org/10.1107/S2052252523009363