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![[Figure 3]](hat5019fig3mag.jpg)
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Figure 3
Peak fitting of integrated data. The top of each image shows the integrated intensity from an azimuthal angle range of −10–15°. Each slice corresponds to one measurement cycle. The timestamps marked with red are shown as a fit to the integrated intensity below. All measurements after t1 are during H2 exposure. The bottom of the figure shows the fitted integrated intensity with the data after subtraction of a linear background (black), total fit (red), α peak (green), β peak (blue) and substrate diffraction peak (orange). (a) Results from area A2, measured every cycle (high repetition rate). The bottom of the figure shows the fits of area A2 measured at the times t1 = 0, t2 = 58 min and t3 = 152 min. No β peak is visible before exposure, while it is clearly present after 58 min and larger than the α peak at the end of the measurement. (b) Results from area B, measured every fourth cycle (intermediate repetition rate). The fitted integrated intensity is from t1 = 0, t2 = 61 min and t3 = 155 min. (c) Results from area C1, measured just before and at the end of the H2 exposure (low repetition rate). The fitted integrated intensity is from t1 = 0 and t3 = 159 min. There is no t2 since the area was only measured twice. The β peak for area C1 is smaller than that for the other areas but still present, indicating a beam-induced effect on the phase transition but not a complete dependence. |
![[Figure 3]](hat5019fig3.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
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