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. 2007 Sep 25;104(40):15705–15710. doi: 10.1073/pnas.0703279104

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© 2007 by The National Academy of Sciences of the USA

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Fig. 4. — Dynamics of the Cu–CO signal. (A) Area under the Cu_B–CO vibrational peak at 2,064 cm⁻¹ as a function of pump-probe delay time. The circles (squares) are data obtained at a 1 kHz (25 Hz) rate. The lines are fits with (i) the instrument response function displaced by 500 fs (dashed), (ii) a 1200-fs exponential convoluted with the instrument response function (dotted), and (iii) a 450-fs exponential displaced by 200 fs and convoluted with the instrument response function (solid). (B) Residuals corresponding to the different fits. (C) Comparison between the signal rise of the main peak at 2,064 cm^M1 (filled circles; same data as in A) and that of the secondary peak at 2,036 cm⁻¹ (open circles; data multiplied by a factor of 2.38) together with the solid-line fit of A.