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Figure 3
(a) Temporal evolution of the Au (111) diffraction peak following laser excitation at various time delays. The absence of the Au (111) peak in the cold sample is attributed to the initial sample texture along the surface. Upon laser excitation, the Au (111) peak emerged, likely due to grain redistribution associated with surface melting and subsequent recrystallization. The dashed lines show a Gaussian fit. Note that the peak intensity is not correctly normalized, due to fluctuations in CRL transmission caused by beam pointing instability. Here, Qr is defined as (Qy2+Qz2)1/2. (b) Evolution of the Au (111) peak positions over time reveals compression along this plane. Note that the (111) peak appears at ∼2.67 Å−1 (lattice constant 4.08 Å) in the cold sample, as characterized ex situ using an X-ray diffractometer.

IUCrJ
Volume 13| Part 3| May 2026| Pages 249-259
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526001727